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

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