7 - ? - 1 = 6, 19 - ? - 18 = 1, 16 - ? - 8 = 8, 13 - ? - 8 = 5, 0 - 8 - ? = 8, 11 - ? - 8 = 3, 6 - 18 - ? = 12, 10 - ? - 2 = 8, 5 - 9 - ? = 4, 20 - ? - 18 = 2,

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