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