s/\w/&=/g :0 s/[1-9]/&-/g y/123456789/012345678/ t0 : s/^\(0-*=\)\(.* \)\1/\2/ t s/=0\(.* \)/\1/ s/-\{10\}// t /-= \| 0/cNO cYES
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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