How about that:

@words=grep{$_}/(?:.*\d.*)?(\b\w+?\b)?/g;
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Note that the anonymous monk want to match anything if there is a digit in the string, and he want to use only a reg exp.
I had problems, because I was matching '' (empty).
The grep solves that.

I hope this help.

P.S. I think it would be better with two reg exp's, but we know, TIMTOWTDI

Regards, Hopes