[...] you might be able to derive from using Algorithm::Diff
A personal remark from me about anything based on: diff: it performs very badly (or "unintuitively" ;-)) when two adjectant substrings are swapped, which is a very common typo, at least for me, I do it all the time — usually with single letters.

In reply to Re^2: compare strings intuitively by bart
in thread compare strings intuitively by rsiedl

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