10 - 5 + 5, 5 - 3 + 2, 8 - 4 + 4, 4 - 2 + 2, 9 - 4 + 5, 12 - 4 + 8, 15 - 8 + 7, 11 - 7 + 4, 4 - 1 + 3, 13 - 5 + 8, 11 - 6 + 5, 7 - 4 + 3, 7 - 1 + 6, 8 - 8 + 0, 13 - 9 + 4, 17 - 8 + 9, 20 - 10 + 10, 10 - 4 + 6, 9 - 6 + 3, 5 - 2 + 3,

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