06:00
0
student
12:00
0
00:50
3
00:49
2
06:00
1
11:00 3
21:00
1
19:00
1
06:00
1
06:00
0
00:35
1
13:00
2
13:00
2
08:00
2
12:00
0
05:00
0
08:00
2
11:00
2
06:00
2
08:00
3