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