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