20:00 2
student
20:00 
06:00 13
05:00 5
05:00 11
12:00 11
06:00 8
25:00 8
21:00 21
44:00 35
05:00 38
31:00 27
18:00 23
15:00 11
45:00 18
32:00 6
36:00 7
12:00 8
11:00 8
28:00 4
10:00 7