s/^/ 0123456789 / : s/\s.* \(.\)/ \10123456789&&/ s/ \(.\)\w*\1.\{10\}\(.\).* ..\(.*\)\2\(.* \)./\2\n\2\3\4/ t P;Q
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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