mro/xkcd936: Generate word combinations like in xkcd.com/936

réplica de https://code.mro.name/mro/xkcd936

Marcus Rohrmoser 2feb8d5225 more elegant.		%!s(int64=4) %!d(string=hai) anos
..
dune	81f5430886 extract a string from a mmapped file	%!s(int64=4) %!d(string=hai) anos
lines.ml	2feb8d5225 more elegant.	%!s(int64=4) %!d(string=hai) anos