Regexp Greek chars by number

I deal with strings that contain Greek and English (Latin) text. I'd like to use a regex to catch all the Greek words that contain 4 or more characters on them.

Using regexp manual I figure out that I can use \p{Greek} to grab all Greek words and \w{4,} in order to grab 4+ c开发者_如何转开发haracter words. However, these two don't work together, from various tests I made.

Is there any way to do what I want using 1 regexp expression? Strings are UTF-8 and come out of tweets.

Regards

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Are you using the UTF-8 pattern modifier?

/\p{Greek}{4,}/u