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Questions  |  score: 4  |  4.35 6.13 5.44 |  Solved By 644 People  |  132048 views  |  since Sep 23, 2011 - 22:52:21

Training: RegexMini (Training, Regex)

Regex Mini
We are trying hard to make a secure site.
So far, we got a secure definition of a username.
Unless you prove otherwise.

Again you are given the source, also as highlighted version.

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