21, 14 + 7 =, 10, 7 + 3 =, 13, 7 + 6 =, 18, 13 + 5 =, 14, 11 + 3 =, 36, 32 + 4 =, 53, 52 + 1 =, 19, 18 + 1=, 20, 15 + 5 =, 100, 98 + 2 =.

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