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A comment on Learn regular expressions in about 55 minutes. Parent comment
(O|RM|HHM)* doesn't match "anything", but rather "nothing" or something quite specific. [0]
There are multiple rows in the puzzle where things _can_ match anything, but they are pretty fast limited by the opposing row/column.
[0]: http://www.regexper.com/#%28O|RM|HHM%29*
(O|RM|HHM)* doesn't match "anything", but rather "nothing" or something quite specific. [0]
There are multiple rows in the puzzle where things _can_ match anything, but they are pretty fast limited by the opposing row/column.
[0]: http://www.regexper.com/#%28O|RM|HHM%29*