Hi ikegami! Many thanks! I forgot to post it here, I think I solved my problem with the String::Approx module (since I always had just 1 mismatch). But I will try your approach as well, it seems to be more solid anyway...
Many thanks again!

In reply to Re^5: Longest common substring with N mismatches by leo1982
in thread Longest common substring with N mismatches by Anonymous Monk

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