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