Code Festival D Compress numbers by tails (alt)

:
s/ $/ 0/
h
y/1234567890/0123456789/
G
s/\(.\).*\( .\).*\n.\(.*\) ./\1\3\2/
s/0*\(.*\)\(.* \)\1/\2/
/. /b
/ ./cNO
cYES

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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