16
15
17
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
18
16
16
21
21
21
21
20
12
21
21
21
17
21
21
16
21
16
21
16
21
21
21
21
21
21
21
21
21
21
15
21
21
8
17
21
11
18
13
19
19
13
8
18
11
13
14
17
14
8
21
18
14
17
21
8
13
18
10
18
21
8
8
16
17
19
11
8
11
13
15
12
12
21
12
15
21
13
15