6 - 13 + __ = 19, 11 - __ + 2 = 13, 8 - 12 + __ = 20, 7 - __ + 4 = 11, 0 - 17 + __ = 17, 20 - __ + 0 = 20, 9 - 11 + __ = 22, 14 - __ + 2   = 16,

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