3-4 2-4 1 5-7 4 12-13 2-4 14-15 1 1-3 1 14 1-2 1 1 8-9 1 2 3 3 7-8 2-3 4 8-9 3 2-3 1-2 14-17 3 13 — 5 4 2 4-5 3-5 4 17-20 4-6 4-5 4-6 7 3-4 1 1-2 4 5 5 2-5 11-12 17-20 2 11 2 1-2 1-2 4 5-6 4-5 3 2-3 3 5-6 1-3 6 4-5 3-5 1 2 1-2 6-8 4-5 16 4-5 3-5 4-5 12 5-9 3-4 9 4-7 5-6 1-2 