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