[(10, 1), (5, 2), (7, 2), (5, 3), (8, 3), (2, 4), (6, 4), (8, 4), (9, 4), (7, 4), (3, 4), (7, 6), (9, 6), (2, 6), (10, 8), (1, 8), (8, 9), (3, 9), (2, 9), (1, 9)]
10 5 7 5 8 2 6 8 9 7 3 7 9 2 10 1 8 3 2 1 1 2 2 3 3 4 4 4 4 4 4 6 6 6 8 8 9 9 9 9