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