A non-cheating solution, 79 points. ^((xx?|xxxx)(\2{7})?)(\1{63})?$ | Hacker News

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willchang on Dec 21, 2013 | parent | context | favorite | on: Regex Golf

A non-cheating solution, 79 points.

  ^((xx?|xxxx)(\2{7})?)(\1{63})?$

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