21
21
16
21
21
21
21
21
14
21
21
16
16
21
21
21
21
21
14
15
16
21
21
21
16
16
16
19
21
16
16
21
21
21
20
16
21
21
21
21
21
20
14
21
14
15
21
21
21
21
21
16
21
18
17
17
20
20
21
20
19
19
20
20
16
16
21
16
16
16
20
21
21
21
21
21
20
21
21
20
21
21
21
21
20
21
18
21
21
21
21
21
21
21
21
21
21
21
21
21
18
21
21
16
21
21
18
21
21
18
21
21
20
16
21
16
21
18
21
21
20
21
20
21
21
21
18
21
21
21
21
21
21
21
21
20
16
16
21
21
18
20
20
21
21
15
15
15
14
15
21
21
21
17
21
16
21
15
21
21
21
21
21
15
21
17
21
21
21
20
21
21
21
21
15
21
21
21
19
21
15
21
16
21
21
21
16
21
21
20
21
21
21
16
16
21
21
21
15