15 + 0 =, 12, 15, 17, 18, 5 + 3 =, 6, 7, 8, 9, 1 + 0 =, 1, 2, 4, 11, 2 + 15 =, 12, 16, 17, 20, 1 + 3 =, 3, 4, 6, 11, 9 + 0 =, 8, 9, 10, 11, 4 + 0 =, 2, 3, 4, 7, 14 + 6 =, 13, 18, 19, 20, 14 + 2 =, 7, 15, 16, 18, 9 + 2 =, 9, 10, 11, 15, 13 + 0 =, 12, 13, 14, 20, 8 + 7 =, 8, 13, 15, 16, 14 + 3 =, 11, 15, 17, 18, 4 + 1 =, 4, 5, 6, 9, 3 + 8 =, 9, 11, 13, 14.

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