So here's my first puzzle for you!
A late casino owner leaves his descendants this letter:
Dear my beloved sons Francis and Owen, dear my beloved wife Uma,
The dice are rolled. You finally made it and as law requires, all of you will get their split of the jackpot. The only thing standing in between you and your lawfully acquired wealth is a four-inch wall of ferro-concrete. To open the door to the safe a four digit number is required that you can derive from the below code. Let's see if you are worth your legacy and settle it once and for all.
Your loving dad/husband Richard
3 4 6 A 3 2 5 J 3 1 3 Q 5 K 3 A A 1 2 5 3 6 5 J 2 3 Q 1
Find the combination!
Can you make a sequence of numbers only from it?
You can derive all information needed from the letter.
No knowledge of specific games is required!
Some restructuring is required in the process. (Hint 2 applies for that, too)
How many splits are there?
EDIT: I updated the description, added a letter to provide better hints to the solution and updated all hints.