21
21
21
21
21
21
21
21
21
21
21
21
21
21
20
21
19
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
15
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
12
21
21
21
21
20
21
21
21
21
20
21
21
17
15
HD
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21