12 - 4 =, 6, 8, 15 - 5 =, 10, 5, 20 - 7 =, 13, 14, 18 - 4 =, 10, 14, 7 - 4 =, 3, 4, 6 - 6 =, 1, 0, 14 - 8 =, 8, 6, 11 - 7 =, 5, 4, 13 - 3 =, 10, 5, 8 - 5 =, 3, 5

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