①-1
①-2
②-1/③-1/④-1
⑤-1/⑥-1
②-2/③-2/④-2
⑤-2/⑥-2
②-3/③-3/④-3
⑤-3/⑥-3
②-4/③-4/④-4/⑤-5/⑥-5
⑤-4
③-5/④-5/⑤-6/⑥-4
③-6
④-6
④-7
⑤-7/⑥-6
⑦
-1
-2
-3
-4
⑧
21
1
2
3
4
⑧-2
⑧-3
⑧-4
⑧-5
⑧-6
⑧-7
⑧-8
⑧-9
⑨-1
⑨-2