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

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