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<oerjan> le/rn abelian group//An abelian group is a group that spends all its time commuting, and therefore never does any real work.
author | HackEso <hackeso@esolangs.org> |
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date | Wed, 27 Mar 2019 23:24:14 +0000 |
parents | c989a1669243 |
children |
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#!/usr/bin/python s=set() try: while True: l=raw_input() if l not in s: s.add(l) print(l) except EOFError: pass