in reply to Re: Delimited Backtracking with Regex
in thread Delimited Backtracking with Regex

Replace (?=a)(?!a) with simply (?!).
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In Section Seekers of Perl Wisdom