0 1-1 1-2 2-1
2-2 3-1 3-2 4-1
4-2 4-3 5-1 5-2
6-1 6-2 7-1 7-2
8-1 8-2 9-1 9-2
10-1 10-2 11-1 11-2
12-1 12-2 13-1 13-2
14-1 14-2 14-3 15-1
15-2 16-1 16-2 end
后记