Re: Could you guide me what should I add Edit speechs?
I don't know if there is a question here. I'm not really an expert on Regular Expressions, and they are not my invention. I use some open source code to handle them, and each time I face the problem I experiment and read the references, until I find a solution. If the RegEx is not working as you expect, try to fix it until it does...
I entered your test regex into "Regex Match Tracer" tool, and it tells me that you regex only matches the "AB " part of the test string (found twice in the test string), nothing more.