I would expect that this can be done through a regular expression. Unfortunately I don't belong to the group of ~10 people on this planet that really understand regex patterns...
So I was hoping someone here can give me some tips, or ideally provide the neccesary regex string... :-)
I don't do regex either, but I have to ask, what are you using CAN-DO for in ABL?
There is a free tool that assists the user with building RegEx strings. It can take a little effort to learn the workflow (at least it took me a bit) but you might this tool helpful: