21
16
12
16
15
16
15
15
21
15
21
12
21
21
21
16
21
21
21
21
21
21
21
21
21
18
16
21
15
15
16
21
12
21
21
21
21
21
21
16
21
16
21
21
16
21
12
16
21
21
21
15
21
16
16
18
21
21
21
21
18
21
21
16
21
15
21
18
21
12
21
21
21
16
15
21
21
16
12
19
21
21
18
19
21
20
21
8
12
21
10
14
20
10
16
12
21
10
9