07:00
0
student
07:00 
08:00
0
07:00
22
11:00
13
15:00
11
22:00
17
01:04:00
24
14:00
5
15:00
4
21:00
21
09:00
17
15:00
32
24:00
20
10:00
0
10:00
0
03:00
18
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