1 + 1 = ...., 2, 1, 3, 2 + 3 = ...., 4, 2, 5, 3 + 1 = ...., 4, 1, 2, 4 + 3 = ....., 1, 6, 7, 5 + 1 = ...., 4, 8, 6, 8 + 2, 11, 10, 9, 6 + 7, 12, 10, 13, 9 + 3 = ...., 12, 8, 13, 6 + 8 = ...., 7, 14, 10, 5 + 4 = ...., 6, 9, 17.

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