15
21
21
21
21
21
16
17
21
21
21
16
21
16
21
21
16
13
21
21
21
21
21
21
21
16
16
21
21
15
21
21
21
21
16
21
21
16
21
16
17
21
19
21
21
18
21
18
12
21
21
21
21
21
21
21
16
21
21
21
17
16
16
16
15
16
21
21
21
13
21
21
14
21
21
21
21
16
21
21
15
16
21
21
21
21
21
20
21
21
21
21
12
15
20
9
16
10
12
13