9 3 0 1 2 3 4 5 6 7 8 0 1 [0] 0 2 [0] 0 3 [0] 0 4 [0] 0 5 [0] 0 6 [0] 0 7 [0] 0 8 [0] 1 2 [0] 1 3 [0] 1 4 [0] 1 5 [0] 1 6 [0] 1 7 [0] 1 8 [0] 2 3 [0] 2 4 [0] 2 5 [0] 2 6 [0] 2 7 [0] 2 8 [0] 3 4 [0] 3 5 [0] 3 6 [0] 3 7 [0] 3 8 [0] 4 5 [0] 4 6 [0] 4 7 [0] 4 8 [0] 5 6 [0] 5 7 [0] 5 8 [0] 6 7 [0] 6 8 [0] 7 8 [0]