1-2
3-2
3
5-2
7-2
8
9
11
13-2
14
17
20-2
21
23
24
26
1
2
4
6-2
8-2
9-2
10-2
12-2
11-2
15
18-2
19
22
24-2
26-2
27-2
2-2
4-2
5
6
7
9-3
10
12
13
16
18
20
23-2
25-2
25
27