9
8
12
21
13
17
21
8
21
18
21
21
21
21
21
21
21
18
17
21
17
21
21
21
21
15
21
21
15
21
15
16
21
21
16
21
21
21
21
16
21
17
16
15
20
12
21
21
17
21
20
18
20
15
12
18
21
21
21
21
18
21
21
17
17
21
21
21
21
21
21
21
15
21
21
21
21
21
12
21
21
12
21
21
21
21
21
16
21
21
15
14
21
15
21
21
15
21
20
15