Does anyone know how to solve this?

Правка en1, от imaonemanarmy, 2018-03-09 22:04:12

https://stackoverflow.com/questions/49174418/shortest-non-shared-substring I can't seem to understand how to solve this, can someone please help?

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en2 Английский imaonemanarmy 2018-03-09 22:15:37 40
en1 Английский imaonemanarmy 2018-03-09 22:04:12 180 Initial revision (published)