Much shorter: print scalar keys %{{map{(lc)x2} /(.)/sg}}; In a oneliner: perl -lne'print if !grep $_ != 15, length, scalar keys %{{map{(lc)x2} /(.)/sg}}' I find two words: There'd probably be a few more in a larger list.

Makeshifts last the longest.

In reply to Re^2: Coffee time quiz by Aristotle
in thread Coffee time quiz by perlmoth

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