h s/ .*// : s/[1-9]/&+/g y/123456789/012345678/ s/+0/9+/ t s/,*00*/ /g G s/\n\S* // :1 s/\( +*\)+\([^ +]\)/\2\1/ t1
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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