10:00 1
student
10:00
06:00 0
34:00 0
01:19
0
10:00
0
05:00
1
00:37
1
05:00 1
29:00 2
11:00 1
25:00 2
20:00 1
10:00 0
01:36 1
34:00 1
27:00 1
13:00 0
36:00 0
25:00 0
33:57
0
