20
21
21
16
21
18
8
21
8
10
11
21
19
15
17
11
13
13
18
21
17
13
13
10
11
12
21
15
14
21
17
21
17
16
21
15
21
16
21
21
16
16
21
21
21
21
21
21
21
21
21
21
21
21
21
16
21
21
21
15
20
21
21
21
21
16
21
21
16
12
21
21
20
21
12
21
18
21
20
21
18
16
20
20
21
21
21
21
21
21
21
18
21
21
21
21
21
9
21