Case 1
1
2
Case 2
3
4
Case 3
5
6
Case 4
7
8
Case 5
9
10
Case 6
11
12
Case 7
13
14r
Case 8
15
16
Case 9
17
18
Case 10
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14r
15
16
17
18
19
20