21
12
15
21
16
21
15
21
16
21
21
21
21
21
16
12
12
21
16
21
13
16
12
16
21
12
12
16
15
21
21
21
21
21
21
12
21
21
16
16
21
12
21
21
16
12
21
21
21
21
12
21
16
11
21
21
21
21
12
12
21
21
16
14
21
12
16
16
12
16
21
21
21
21
21
21
16
16
21
21
16
21
12
21
21
21
18
21
21
21
12
21
21
20
12
21
12
12
21
21
21
21
21
21
21
21
20
21
16
20
21
19
20
21
20
21
20
15
20
11
16
20
21
16
21
11
20
12
16
16
11
21
19
21
20
20
12
20
20
15
19
21
21
16
12
20
20
20
19
20
21
21
12
16
21
10
21
21
21
21
21
16
15
12
21
16
12
20
15
16
14
21
16
16
15
20
12
21
16
21
16
12
21
15
12
21
21
21
21
12
16
21
21
21
21
21
16
21
21