3 + ? = 5, 2, 3, 4, 7, 4 + ? = 9, 1, 2, 5, 8, 4 + ? = 16, 8, 12, 13, 15, 2 + ? = 4, 2, 3, 6, 13, 1 + ? = 5, 2, 3, 4, 8, ? + 7 = 9, 2, 6, 10, 12, ? + 4 = 19, 7, 13, 15, 16, 1 + ? = 17, 16, 17, 18, 19, ? + 7 = 11, 3, 4, 5, 8, 1 + ? = 4, 2, 3, 4, 7, ? + 9 = 12, 1, 2, 3, 11, ? + 12 = 19, 5, 6, 7, 9, ? + 8 = 20, 11, 12, 13, 14, 3 + ? = 6, 3, 4, 5, 16, ? + 8 = 10, 1, 2, 7, 13.

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