21
21
21
15
16
21
20
21
15
21
21
21
20
21
20
21
17
21
16
21
15
17
21
21
15
21
14
21
17
21
21
18
21
17
21
21
21
21
21
17
21
21
21
21
15
21
15
20
21
17
21
20
21
20
21
21
18
20
21
21
21
21
21
15
16
20
21
15
21
15
15
20
15
21
21
21
17
21
21
21
21
20
21
21
21
21
21
21
20
21
21
21
15
21
21