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

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