. 2 2 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 4 4 4 4 4 4 3 3 3 3 3 3 5 2 2 3 3 3 3 4 4 5 5 5 4 4 4 4 4 6 5 5 3 4 5.5 4.5 4.5 3 3 2.5 2.5 5.5 5.5 6.5 4.5 1.5 2.5 2.5 4.5 2 . . .