Code Festival D Compress numbers by tails (%20)

:
s/[1-9]/&-/g
y/123456789/012345678/
t
s/^\(.\)\(.* \)\1\|0\(.* \)\|-\{10\}/\2\3/
t
/-\| ./cNO
cYES

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

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