20
16
15
21
21
21
16
12
21
21
21
21
21
21
16
16
15
21
16
16
16
16
21
12
21
21
21
21
16
21
12
21
21
21
21
16
16
16
20
21
12
21
15
21
16
21
16
21
21
21
16
21
21
21
11
21
21
21
21
21
16
15
16
21
12
21
16
21
16
20
16
20
20
15
14
14
16
21
21
12
21
16
21
16
21
21
21
21
16
21
15
15
21
16
21
21
16
17
12
12