How to solve this problem?

Revision en1, by 444iq, 2019-09-07 10:39:46

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  Rev. Lang. By When Δ Comment
en3 English 444iq 2019-09-07 10:42:29 196
en2 English 444iq 2019-09-07 10:41:04 221
en1 English 444iq 2019-09-07 10:39:46 98 Initial revision (published)