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Answers and rating deltas for

What is wrong in this regular expression?

Author Votes Δ
acquasparta 2 +4.35
John Woo 1 +0.05
Michal Klouda 1 +0.40
Florian 1 +0.54
Ωmega 0 -1.06
Last visited: Sep 14, 2014, 5:07:29 AM