in reply to TIMTOWTDI/golf - counting backwards

perl -le'$_=__________;_ while s/_/print length;""/e' And even better: perl -le'__________=~/^.+(?{print@+})^/'

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Jeff[japhy]Pinyan: Perl, regex, and perl hacker.
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;