10, 5 + ? = 15, 0, ? + 4 = 4, 4, ? + 13 = 17, 1, 6 + ? = 7, 9, ? + 10 = 19, 11, ? + 3 = 14, 3, 6 + ? = 9, 8, ? + 4 = 12, 2, ? + 11 = 13, 16, 4 + ? = 20, 5, ? + 2 = 7, 7, 1 + ? = 8, 6, 1 + ? = 7, 14, 3 + ? = 17, 15, ? + 1 = 16

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