: s/-/<<123456789-01>/ s/\(.\)<.*\1\(-*.\).*>/\2/ t /0000/d h s/$/:1234567890/ :1 s/\(.\)\(.\)\(.*:.*\2.*\1.*\)/\2\1\3/ t1 s/^\(.\?\([^0]\)\|.*\)\(\2\(.*\)\4\|\1.\):.*/\3\1/p g s/$/-/ b
Note that non-ascii characters in the above source code will be escaped (such as \x9f).