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Challenges The 50 substrings that validate any string of Roman numerals

Python, 220 bytes Works with Python 3.8 or newer. n=" IVXLCDM" x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;...

posted 20d ago by Arpad Horvath‭  ·  edited 17d ago by Arpad Horvath‭

Answer
#10: Post edited by user avatar Arpad Horvath‭ · 2024-04-22T14:19:41Z (17 days ago)
version
  • # [Python], 220 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • There are 8 kind of characters, " IXLCDM". 2 characters are 6 bits that can be easily mapped to printable characters (after code point 32). This string is much shorter (half) then the "DD DM IC ..." string itself. Even if I add the extraction it is still somewhat shorter.
  • I just regenerate the " IXLCDM" characters from this string.
  • So it is the same as the code below just with some decoding from 6-bit-string.
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python], 220 bytes
  • Works with Python 3.8 or newer.
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python]: https://docs.python.org
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • There are 8 kind of characters, " IXLCDM". 2 characters are 6 bits that can be easily mapped to printable characters (after code point 32). This string is much shorter (half) then the "DD DM IC ..." string itself. Even if I add the extraction it is still somewhat shorter.
  • I just regenerate the " IXLCDM" characters from this string.
  • So it is the same as the code below just with some decoding from 6-bit-string.
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#9: Post edited by user avatar Arpad Horvath‭ · 2024-04-22T14:18:34Z (17 days ago)
just python
  • # [Python 3.8 (pre-release)], 220 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • There are 8 kind of characters, " IXLCDM". 2 characters are 6 bits that can be easily mapped to printable characters (after code point 32). This string is much shorter (half) then the "DD DM IC ..." string itself. Even if I add the extraction it is still somewhat shorter.
  • I just regenerate the " IXLCDM" characters from this string.
  • So it is the same as the code below just with some decoding from 6-bit-string.
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python], 220 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • There are 8 kind of characters, " IXLCDM". 2 characters are 6 bits that can be easily mapped to printable characters (after code point 32). This string is much shorter (half) then the "DD DM IC ..." string itself. Even if I add the extraction it is still somewhat shorter.
  • I just regenerate the " IXLCDM" characters from this string.
  • So it is the same as the code below just with some decoding from 6-bit-string.
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#8: Post edited by user avatar Arpad Horvath‭ · 2024-04-21T07:47:37Z (19 days ago)
  • # [Python 3.8 (pre-release)], 220 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python 3.8 (pre-release)], 220 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • There are 8 kind of characters, " IXLCDM". 2 characters are 6 bits that can be easily mapped to printable characters (after code point 32). This string is much shorter (half) then the "DD DM IC ..." string itself. Even if I add the extraction it is still somewhat shorter.
  • I just regenerate the " IXLCDM" characters from this string.
  • So it is the same as the code below just with some decoding from 6-bit-string.
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#7: Post edited by user avatar Arpad Horvath‭ · 2024-04-20T19:31:26Z (19 days ago)
even shorter 220
  • # [Python 3.8 (pre-release)], 223 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x="".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;'])
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8fdrlb]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8fdrlb]: https://tio.run/##TY5fT8IwFMXf@RTt7Qotf4ZKojhoxMzoFrfBi3PJnAQZxBlolzKT@elnhy@e5N578ns455Y/1aeSk2mpm0YKQH6cBO5DCJ1aANhfqpAslSlTjmC5mdoRSudsy/locsXH4ynPBjLNR9O@yvZKoy0qZK@7esWejRdjy3u0Fk/gXcPiBi4mZHVHI7qkLzSj73TdjbpL3McDfIkFvsVz7OCZJaw59GFAQhKRgCzJM3GJIHMaepy/9dbJbNbLeEeLw@b4kW/Q1jluanZCxR6ZJU3/7nDawT20z5xJbZ/KQ1ExzpuWye9jS1PwYxgiCF2jJPbP3ihwW@cb/ZEk@W9jyJwOQqjUhayYiRoi3R6T/Qs "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python 3.8 (pre-release)], 220 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(d:=ord(c)-32)//8]+n[d-8*(d//8)]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8huwl2]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8huwl2]: https://tio.run/##TY5fT4MwFMXf9ynaW7q1sIFKohPWOINRiGPbi9gEccGxRcxWCJvJ/PSz4Ivn4d5zfsn9U/8cPyvljuvmfFYCUJTIWfAQQ@8kGID9VZWKpSplhSeqpmBrPnKvuOOMM0ulxWhsskIHnm2rBq1RqQb95SsObTx1jPDRmD5BeA3TG7hwyfKOzumCvtCMvtNVf95fYBNb@BILfIsn2MO@IYwJmGCRmMzJjCzIMwmIIBMah5y/DVbS9wcZ571G7PL9R5GjtbfPT@yAyi3SRekHNrvDBu6h/aYjJ/tQ78oj4/zcMvW9b2kKUQJDBHGgJZOo81qzoHWR1h@R8r/tRmTcZSkDyLweQqhuSnVkevEQNW3Tl34B "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#6: Post edited by user avatar Arpad Horvath‭ · 2024-04-20T18:23:06Z (19 days ago)
Fixing the code
  • # [Python](https://python.org), 222 bytes
  • ```python
  • n=" IVXLCDM"
  • r=lambda c:max(s if s in c else"A"for s in ("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;'])).split())
  • ```
  • I couldn't make it work in TIO (Python 3.8 pre-release), but works for me with Python 3.9 on my computer.
  • # [Python](https://python.org), 225 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv7hbizd]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv7hbizd]: https://tio.run/##TY5BT4NAFITv/RW7b9myCy1Vm2iFbsRgFGJpexFJEBssbcTAQmhN8NfXpV6c5L2ZfIfJND/Hz1pOZ017OkkBKIjihfcQwqATDMD6qgvJEpmw2hYsV9fZom5ztuV8PL3ik8mMp6ZM8vHMqNN93aItKqQ@XL9i38LuRPMfNfcJ/Gtwb@BiStZ3dElX9IWm9J1uhsvhChvYxJdY4Fs8xzZ2NKHNwQCThGRJFmRFnolHBJnT0Of8Td/EjqOnnA9aUWbVR56hrV1lHTugYo/Uk2rArjzs4B76NWfSWYemLI6M81PP5HfV0wSCCEYIQk8pjoJzVlp4fQqU/kgc/48RpPYAIdS0hTwyVTVCbW@q@xc "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python 3.8 (pre-release)], 223 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x="".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;'])
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv8fdrlb]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv8fdrlb]: https://tio.run/##TY5fT8IwFMXf@RTt7Qotf4ZKojhoxMzoFrfBi3PJnAQZxBlolzKT@elnhy@e5N578ns455Y/1aeSk2mpm0YKQH6cBO5DCJ1aANhfqpAslSlTjmC5mdoRSudsy/locsXH4ynPBjLNR9O@yvZKoy0qZK@7esWejRdjy3u0Fk/gXcPiBi4mZHVHI7qkLzSj73TdjbpL3McDfIkFvsVz7OCZJaw59GFAQhKRgCzJM3GJIHMaepy/9dbJbNbLeEeLw@b4kW/Q1jluanZCxR6ZJU3/7nDawT20z5xJbZ/KQ1ExzpuWye9jS1PwYxgiCF2jJPbP3ihwW@cb/ZEk@W9jyJwOQqjUhayYiRoi3R6T/Qs "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#5: Post edited by user avatar Arpad Horvath‭ · 2024-04-20T02:48:18Z (20 days ago)
3.9
  • # [Python](https://python.org), 225 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv7hbizd]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv7hbizd]: https://tio.run/##TY5BT4NAFITv/RW7b9myCy1Vm2iFbsRgFGJpexFJEBssbcTAQmhN8NfXpV6c5L2ZfIfJND/Hz1pOZ017OkkBKIjihfcQwqATDMD6qgvJEpmw2hYsV9fZom5ztuV8PL3ik8mMp6ZM8vHMqNN93aItKqQ@XL9i38LuRPMfNfcJ/Gtwb@BiStZ3dElX9IWm9J1uhsvhChvYxJdY4Fs8xzZ2NKHNwQCThGRJFmRFnolHBJnT0Of8Td/EjqOnnA9aUWbVR56hrV1lHTugYo/Uk2rArjzs4B76NWfSWYemLI6M81PP5HfV0wSCCEYIQk8pjoJzVlp4fQqU/kgc/48RpPYAIdS0hTwyVTVCbW@q@xc "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python](https://python.org), 222 bytes
  • ```python
  • n=" IVXLCDM"
  • r=lambda c:max(s if s in c else"A"for s in ("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;'])).split())
  • ```
  • I couldn't make it work in TIO (Python 3.8 pre-release), but works for me with Python 3.9 on my computer.
  • # [Python](https://python.org), 225 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv7hbizd]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv7hbizd]: https://tio.run/##TY5BT4NAFITv/RW7b9myCy1Vm2iFbsRgFGJpexFJEBssbcTAQmhN8NfXpV6c5L2ZfIfJND/Hz1pOZ017OkkBKIjihfcQwqATDMD6qgvJEpmw2hYsV9fZom5ztuV8PL3ik8mMp6ZM8vHMqNN93aItKqQ@XL9i38LuRPMfNfcJ/Gtwb@BiStZ3dElX9IWm9J1uhsvhChvYxJdY4Fs8xzZ2NKHNwQCThGRJFmRFnolHBJnT0Of8Td/EjqOnnA9aUWbVR56hrV1lHTugYo/Uk2rArjzs4B76NWfSWYemLI6M81PP5HfV0wSCCEYIQk8pjoJzVlp4fQqU/kgc/48RpPYAIdS0hTwyVTVCbW@q@xc "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#4: Post edited by user avatar Arpad Horvath‭ · 2024-04-20T02:30:20Z (20 days ago)
  • # [Python 3.8 (pre-release)](https://python.org), 225 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv7hbizd]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv7hbizd]: https://tio.run/##TY5BT4NAFITv/RW7b9myCy1Vm2iFbsRgFGJpexFJEBssbcTAQmhN8NfXpV6c5L2ZfIfJND/Hz1pOZ017OkkBKIjihfcQwqATDMD6qgvJEpmw2hYsV9fZom5ztuV8PL3ik8mMp6ZM8vHMqNN93aItKqQ@XL9i38LuRPMfNfcJ/Gtwb@BiStZ3dElX9IWm9J1uhsvhChvYxJdY4Fs8xzZ2NKHNwQCThGRJFmRFnolHBJnT0Of8Td/EjqOnnA9aUWbVR56hrV1lHTugYo/Uk2rArjzs4B76NWfSWYemLI6M81PP5HfV0wSCCEYIQk8pjoJzVlp4fQqU/kgc/48RpPYAIdS0hTwyVTVCbW@q@xc "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python](https://python.org), 225 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv7hbizd]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv7hbizd]: https://tio.run/##TY5BT4NAFITv/RW7b9myCy1Vm2iFbsRgFGJpexFJEBssbcTAQmhN8NfXpV6c5L2ZfIfJND/Hz1pOZ017OkkBKIjihfcQwqATDMD6qgvJEpmw2hYsV9fZom5ztuV8PL3ik8mMp6ZM8vHMqNN93aItKqQ@XL9i38LuRPMfNfcJ/Gtwb@BiStZ3dElX9IWm9J1uhsvhChvYxJdY4Fs8xzZ2NKHNwQCThGRJFmRFnolHBJnT0Of8Td/EjqOnnA9aUWbVR56hrV1lHTugYo/Uk2rArjzs4B76NWfSWYemLI6M81PP5HfV0wSCCEYIQk8pjoJzVlp4fQqU/kgc/48RpPYAIdS0hTwyVTVCbW@q@xc "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#3: Post edited by user avatar Arpad Horvath‭ · 2024-04-20T02:29:41Z (20 days ago)
shorter
  • # [Python](https://python.org), 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python 3.8 (pre-release)](https://python.org), 225 bytes
  • <!-- language-all: lang-python -->
  • n=" IVXLCDM"
  • x=("".join([n[(o:=(d:=(x:=ord(c))-32)//8)]+n[d-8*o]for c in'&PW!H.!@/$HF$@G"H6"@7"03#P?%N%O%U%]%^%_&N&O!*!+!1!=!9!<!:!;$=$<"*"+#M#N#L#O#K#C#=#<%MH))\'_X;;']))
  • r=lambda c:max(s if s in c else"A"for s in x.split())
  • [Try it online!][TIO-lv7hbizd]
  • [Python 3.8 (pre-release)]: https://docs.python.org/3.8/
  • [TIO-lv7hbizd]: https://tio.run/##TY5BT4NAFITv/RW7b9myCy1Vm2iFbsRgFGJpexFJEBssbcTAQmhN8NfXpV6c5L2ZfIfJND/Hz1pOZ017OkkBKIjihfcQwqATDMD6qgvJEpmw2hYsV9fZom5ztuV8PL3ik8mMp6ZM8vHMqNN93aItKqQ@XL9i38LuRPMfNfcJ/Gtwb@BiStZ3dElX9IWm9J1uhsvhChvYxJdY4Fs8xzZ2NKHNwQCThGRJFmRFnolHBJnT0Of8Td/EjqOnnA9aUWbVR56hrV1lHTugYo/Uk2rArjzs4B76NWfSWYemLI6M81PP5HfV0wSCCEYIQk8pjoJzVlp4fQqU/kgc/48RpPYAIdS0hTwyVTVCbW@q@xc "Python 3.8 (pre-release) – Try It Online"
  • ## 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#2: Post edited by user avatar Arpad Horvath‭ · 2024-04-19T22:25:22Z (20 days ago)
  • # [Python 3](https://python.org), 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
  • # [Python](https://python.org), 238 bytes
  • If the r= part is not needed then 2 bytes less
  • <!-- language-all: lang-python -->
  • r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())
  • [Try it online!][TIO-lv78jx4k]
  • [Python 3]: https://docs.python.org/3/
  • [TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"
#1: Initial revision by user avatar Arpad Horvath‭ · 2024-04-19T22:24:25Z (20 days ago) 
# [Python 3](https://python.org), 238 bytes

If the r= part is not needed then 2 bytes less

<!-- language-all: lang-python -->

    r=lambda c:max(s if s in c else"A"for s in'DD DM IC ID IL IM LC LD LL LM VC VD VL VM VV VX XD XM CCD CCM CDC CMC CMD CMM DCD DCM IIV IIX IVI IXC IXI IXL IXV IXX LXC LXL VIV VIX XCC XCD XCL XCM XCX XLX XXC XXL CCCC IIII MMMM XXXX'.split())

[Try it online!][TIO-lv78jx4k]

[Python 3]: https://docs.python.org/3/
[TIO-lv78jx4k]: https://tio.run/##TY8xa8NADIX3/orHLXEgdOkW6FB0i0C3CkHo4KYJNdiOsV1ofr37Ll0qeCfp490DTff16za@bNv82rfDx2eL83Fof5oF3RV8Rpxx6ZdLekvX2/wgu5yRC1SgGWrQAhNYhhmswAWe4Qbn7PBAZESBSKbYs0BKFfdSkMkzuapTAXWFBsOjdsYHeQSMzLg7fU5fiFCMFqMKRWYUfUGfsBioisIiitg9L1Pfrc1@v9Vjxu@hHnhK6umAVOqPcH3MLJM61YQ/EvF/9PR@fAIwzd24Now6YK6N2b8 "Python 3 – Try It Online"