Nothing like my trusty weapon John while I ride my Dead horse. This was such a clever take on the prompt. Great job! You have about 12,663,023,891,548,041,000,000,000 combinations, which is a lot. Thanks for not allowing numbers. That would have been a much larger number...
Doing it again, I got a different answer, but it's bigger. So... take that for what you will. 2 days ago(+1)
I see, and that's not even counting the position/rotation of the letters and that one letter can have multiple colors!