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

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