- Plain Strings (207):
foo - Anchors (208):
k$ - Ranges (202):
^[a-f]+$ - Backrefs (201):
(...).*\1 - Abba (193):
^(?!.*(.)(.)\2\1) - A man, a plan (177):
^(.)[^p].*\1$ - Prime (286):
^(?!(..+)\1+$) - Four (199):
(.)(.\1){3} - Order (199):
^[^o]?.{5}$ - Triples (588):
1..?4|1.7|4.2|6.0|(00[039]|12|015|50)$|006
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