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Japt v2.0a0, 22 bytes n"IXCMVLD" gFì ï*4ÆApX Try it (includes all test cases) n"..." gFì ï*4ÆApX :Implicit input of character string n"..." :Convert from custom base to de...
#1: Initial revision
# [Japt](https://github.com/ETHproductions/japt) v2.0a0, 22 [bytes](https://en.wikipedia.org/wiki/ISO/IEC_8859-1)
n"IXCMVLD" gFì ï*4ÆApX
[Try it](https://petershaggynoble.github.io/Japt-Interpreter/?v=2.0a0&code=biJJWENNVkxEIiBnRuwg7yo0xkFwWA&input=WyJJIiwiViIsIlgiLCJMIiwiQyIsIkQiLCJNIl0tbVM) (includes all test cases)
n"..." gFì ï*4ÆApX :Implicit input of character string
n"..." :Convert from custom base to decimal
g :Index into
F : 15
ì : To digit array
ï : Cartesian product with
* : Reducing each pair by multiplication
4Æ : Map the range [0,4)
A : 10
pX : Raised to the power of X
