1 and 1 make, 4, 2, 3 and 3 make, 6, 4, 5 and 5 make, 10, 15, 4 and 4 make , 7, 8, 2 and 2 make , 4, 6, 6 and 6 make , 13, 12, 7 and 7 make, 14, 15.

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