8 7 6 5 4 4 4 4 4 3 3 3 3 3 3 3 3 2 2 2 2 1 2 2 2 2 2 2 2 1 1 1 2 2 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 2 8.5 1 1 3.5 4.5 3 4.5 4 2.5 2.5 . 1-2 1-2 1-2 1-2 1-2 1-2 2-3 2-3 2-3