13
17
21
8
21
21
21
21
21
21
17
21
21
17
21
21
21
15
21
21
15
21
15
16
21
16
21
21
16
21
16
21
21
21
20
18
20
18
21
21
21
21
21
21
21
21
21
21
21
15
21
21
21
21
21
21
21
12
21
21
21
21
21
16
21
15
14
21
15
21
21
15
21
15
15
21
21
21
16
14
21
16
21
21
16
21
21
20
21
15
21
21
21
21
15
21
21
16
16
21