RegExpert RegExpert 59 Teams solved. Description Do you remember "hard to say" last year? I think this one is harder to say... nc 52.69.125.71 2171 Hint None % cat regexp (?i)s.*e.*l.*e.*c.*t ^(a\g<1>?b)$ ^(?!(xx+)\1+$)xx+$ ^((.)\g<1>\2|.?…