16
12
17
21
21
21
12
21
16
21
21
12
12
16
21
12
11
21
21
12
21
21
15
21
18
21
12
16
21
12
16
20
16
21
21
21
20
12
16
16
21
12
21
21
16
16
21
21
21
21
21
21
21
17
21
16
16
16
21
21
21
18
21
16
16
21
21
16
12
16
21
21
12
15
21
21
12
21
21
19
21
16
14
16
16
21
20
13
16
21
21
21
20
21
12
16
21
12
16
15