Key Algo

9J1J8-6G7C5-F6GGF

Rules:
*Letters become their corresponding number-place in the alphabet. IE the letter 'A' would become 0.
*Numbers 3 and 4 in each segment are based off the other three numbers in the segment.

If you find the algorithm, and you can successfully generate valid codes, send me a PM on HF (UID 1448959).
There is a prize

-pat