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@manasij7479: So what's the point of you last two comments then, trolling? If so congrats, mission accomplished.

I take it you think my response to you was blatantly obvious, but if it was, then...

The guy is asking for critique and ways to improve it in the comment made at the top of the code. All people are doing is to respond to that request.

The only thing one would have to do to break it, is to enter a user name longer than 20 characters.