. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 3 3 3 3 3 4 4 2 2 2 2 2 2 2 2 3 4 4 4 4 4 1.5 0.5 2.5 4.5 5 4.5 0.5 3.5 . . .