21
21
21
16
12
16
12
21
20
21
21
21
21
21
21
16
21
21
16
21
12
16
12
20
21
16
17
21
21
21
12
21
19
20
21
18
12
16
21
12
21
21
21
21
18
21
21
21
19
21
12
21
12
21
12
16
16
16
21
21
15
21
17
18
16
17
16
16
21
21
16
12
16
20
15
21
21
21
20
12
15
21
21
21
21
20
21
16
15
20
21
21
21
21
21
21
16
21
21
18