10:00
0
student
10:00 
25:00
14
27:00
11
18:00
2
07:00
13
08:00
0
07:00
25
11:00
17
15:00
16
22:00
17
01:04:00
26
14:00
5
15:00
8
21:00
23
09:00
19
15:00
35
24:00
21
10:00
3
03:00
18
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