. 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 2 2 2 3 3 3 4 4 4 4 5 6 4 4 4 4 5 5 6 6 7 2 4 4 7.5 3 3 3 3 5 5 1 2.5 2.5 4.5 4.5 6.5 1 1 1 3 3 3.5 3.5 . . .