Thanks guys I knew it was something so simple. As a designer I don't use math much anymore although it was always one of my favorite subjects in school.
This is great because this was based on a real life situation of creating images of these groups for a client. I created 60 so I see now that...
This may be simple but I want to see a formula and admit I've been out of school too long to figure this one out. Although it's bugging me! I would like to see a formula, too, not just the answer.
So you have 6 items. For example ABCDEF.
You must use at least one item.
Order does not matter...