Yet Another Multiple Problem

Revision en1, by undefined_error_, 2019-09-25 23:26:53

I am trying to solve it for a while but didn't come up with a efficient idea. Any hints would be great. Thanks :)

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en2 English undefined_error_ 2019-09-25 23:27:37 64
en1 English undefined_error_ 2019-09-25 23:26:53 141 Initial revision (published)