23 - 12 = 12 - 23, swap, stop, 3 + 5 = 5 + 3, swap, stop, 12 - 5 = 5 - 12, swap, stop, 4 + 7 = 7 + 4, swap, stop, 10 + 6 = 6 + 10, swap, stop, 15 - 6 = 6 - 15, swap, stop, 12 + 3 = 3 + 12, swap, stop, 20 + 5 = 5 + 20, swap, stop, 30 + 12 = 12 + 30, swap, stop, 20 - 7 = 7 - 20, swap, stop, 8 - 3 = 3 - 8, swap, stop, 13 + 4 = 4 + 13, swap, stop, 10 - 4 = 4 - 10, swap, stop, 30 - 10 = 10 - 30, swap, stop, 9 + 2 = 2 + 9, swap, stop, 45 - 20 = 20 - 45, swap, stop

commutative or not bingo calling cards

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