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C (clang), 63 bytes x,y;main(){scanf("%i%i",&x,&y);printf("%i %i\n%i %i",x,y,y,x);} Try it online!
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# [C (clang)], 63 bytes <!-- language-all: lang-c --> x,y;main(){scanf("%i%i",&x,&y);printf("%i %i\n%i %i",x,y,y,x);} [Try it online!][TIO-ksego3fd] [C (clang)]: http://clang.llvm.org/ [TIO-ksego3fd]: https://tio.run/##S9ZNzknMS/@vnJmXnFOakqpgU1ySkpmvl2H3v0Kn0jo3MTNPQ7O6ODkxL01DSTVTNVNJR61CR61S07qgKDOvBCyooJoZkwemlHSAmoCwQtO69v9/QwMFQ3MA "C (clang) – Try It Online"