Freelancer:
RikkaAutomate
Voittaja
Script
I hope I understood correctly what you wanted the script to do. Change line 1 in the script to specify your file. The file has to be in the same format as you wrote, with no headers. It will take all members from the reference group, and add them to the destination group unless they are a member of the difference group. Correct? It's a weird format to update it in, breaks the formatting a bit, but here's a PDF.