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