06:00
2
student
00:10
3
14:00
2
11:00
1
12:00
2
09:00
0
00:24
5
05:00
1
05:00
2
31:00
1
14:00
1
07:00
0
18:00
2
10:00
0
17:00
0
08:00
1
10:00
1
11:00
1
10:00
0
08:00
5