6 5 5 5 4 4 4 4 4 4 4 3 3 2 2 2 2 2 2 3 3 3 3 3 2 3 2 2 3 3 2 2 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 1 1 3 2.5 2.5 4 5.5 6.5 6 3.5 1 2 2 3 1 1 1 1 1 2.5 . 1-2 1-2 1-2 1-2 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 4-5 4-5