Parsing/Extrating String Text From a .Txt file.

I have a group of text files that I need to search through containing multiple of these strings.

<a href="http://Website.com/profiles/76561198034531966">

What i need to do is pull random Numbers. eg. 76561198034531966 or the entire string.

is there anyway i can do this? if so can someone help me Code this?

I have a Basic knowledge in using autoit

Thanks in Advance,