1

Jelly, 9 7 bytes
t"ƑÐƤi1
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ÐƤ For each suffix,
Ƒ is it the same after
t trimming off
" the corresponding element of the word from each element?
i1 Find the first index of 1.
Wait, what?
This beats the original, W€ḟ"ƑÐƤi1, by completely dro...