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