B \(a\)*\1 a NOMATCH
#E (?l)(a*)(b|abc)(c*) abc (0,3)(0,0)(0,3)(3,3)
E (...?.?)* xxxx (0,4)(0,4)
E (...?.?)* xxxxx (0,5)(3,5)
E (...?.?)* xxxxxx (0,6)(4,6)
E (...?.?)* xxxxxxx (0,7)(4,7)
E (...?.?)* xxxxxxxx (0,8)(4,8)
E (...?.?)* xxxxxxxxx (0,9)(7,9)
E (...?.?)* xxxxxxxxxx (0,10)(8,10)
E (...?.?)* xxxxxxxxxxx (0,11)(8,11)
{C en_GB.UTF-8
E ^([[:digit:]]){3}$ abc NOMATCH
}
B \(a\(b\)*\)*\2 abab NOMATCH
B a\(b\)*c\1 acb NOMATCH
B a\(b\)*c\1 abbcbbb (0,5)(2,3)
B a\(b\)*c\1 abbdbd NOMATCH
E (a|ab)(bc|c) abcabc (0,3)(0,2)(2,3)
:RE#33:E (aba|ab|a|z)* ababa (0,5)(2,5)
:RE#33:E (aba|ab|a|(z))* ababa (0,5)(2,5)