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