3+2 - 5, 2+2 - 4, 3+1 - 4, 2+2 - 4, 1+1 - 2, 3+2 - 5, 8+1 - 9, 5+2 - 7, 4+2 - 6, 3+1 - 4, 8+2 - 10, 9+2 - 11, 0+2 - 2, 6+2 - 8, 10+2 - 12, 8+1 - 9, 0+2 - 2, 0+1 - 1, 6+2 - 8, 1+2 - 3,

Addition counting on by 1 & 2

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