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