Thank you Krambambuli. I don't understand completly the regexp you submitted, but it seems that the version submitted by "mwah" is more generic.

I forgot to mention in the statement of the problem that the "aaa" is in fact "aaa+", a given token can contain any number of characters not just those I used in my example

I appreciate the help of you all.

In reply to Re^2: Need help with perl regexp by flaviusm
in thread Need help with perl regexp by flaviusm

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