21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
9
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
21
21
21
21
21
21
21
21
20
21
21
21
15
21
21
21
21
16
21
17
16
16
8
10
21
8
12
10
11
10
10
8
18
15
12
21
19
20
11
15
12