21
21
15
16
21
21
19
20
20
21
21
21
21
21
21
21
21
20
15
17
15
21
21
15
21
21
21
21
12
21
21
21
16
21
20
15
21
17
16
16
21
20
21
21
16
19
21
21
20
21
21
21
16
21
21
21
21
15
21
21
16
15
21
17
15
21
21
15
21
20
20
12
16
21
21
21
21
16
21
21
20
21
17
21
21
21
21
17
21
15
21
15
21
21
18
18
15
15
16
20