. 1 1 1 2 2 2 1 1 2 2 2 2 2 2 3 3 3 4 3 3 3 3 3 3 3 2 3 3 2 2 2 1 3 4 4 5 5 5 4 4 4 2 1 4 5 5 5 5 5 6 6 7 7 8 4 3 4 6 6 6 7 8 8 . . . . 3.5 8.5 8.5 8.5 2.5 0.5 1.5 2.5 0.5 0.5 3.5 3.5 4 4 0.5 1 5.5 4.5 4.5 1 2 3 2