7 7 6 5 5 3 3 5 4 4 4 3 3 3 3 3 2 2 1 1 2 2 2 2 3 3 3 3 3 3 1 2 2 2 2 1 1 2 5 6 6 5 2 2 1 6 4 5 8 7.5 2 4 4 1 1 1 1 1 4 4 4 4 4 4 4 3 . 1-2 1-2 1-2 1-2 1-2 2-3 2-3 2-3 2-3 2-3 2-3 3-4 3-4 3-4 3-4 3-4 3-4 3-4 2-3 4-5 4-5