21
15
20
16
21
21
21
21
21
21
21
21
20
21
21
21
21
21
15
21
21
21
21
21
21
21
21
16
21
20
21
21
21
12
21
13
21
21
21
21
21
21
21
21
21
16
20
21
21
21
21
21
20
15
21
21
16
21
15
21
20
21
21
16
21
21
21
21
21
21
15
21
16
21
21
21
21
21
21
15
17
21
16
16
21
21
21
15
21
20
21
21
16
20
19
15
21
16
21
21