Acct # xx-XXXxx-x-39670
Acct # XXXxx-XXXx-2391
Think GAME <-This smells a hint to solve the "XXX"
Just after these account number you have in caps (when it should not be in caps) "GAME" "PLAYERS" and "REWARDS"
These 3 words in caps should give hints for the 3 "XXX" caps, in the same order.