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