21
16
17
16
12
16
21
21
19
21
16
21
21
21
16
21
16
17
15
20
21
13
21
21
21
21
16
21
16
21
21
21
15
16
21
21
21
21
20
21
18
18
21
20
21
21
21
21
21
18
20
15
21
21
21
20
18
18
21
21
16
15
21
21
21
12
18
18
20
18
18
18
16
21
21
21
20
18
21
21
21
21
16
18
16
21
16
21
21
21
21
21
21
21
15
21
21
21
21
18