1, 2, 1, 0, 1, 2, 3, 2, 3, 2, 3, 4, 3, 4, 5, 6, 7, 6, 7, 8, 9, 8, 7, 8, 9, 10, 10, 11, 12, 11, 13, 12, 13, 12, 13, 13, 14, 13, 15, 16, 17, 18, 16, 16, 17, 16, 15, 16, 17, 17, 17, 18, 17, 18, 19, 20, 21, 23, 23, 22, 21, 22, 23, 24, 22, 23, 22, 23, 23, 22, 22, 21