p : s/[1-9]/&=/g y/123456789/012345678/ t s/==/-/g s/=0/0-----/g /=/s/-/=--/g s/=/----/g :0 s/-/<<123456789-01>/ s/^0\B\|\(.\)<.*\1\(-*.\).*>/\2/ t0 p /^1$/Q b
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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