31:20 93
students
31:20 
19:01 6
13:44 3
18:38 6
41:53 5
30:23 4
45:29 21
37:37 14
40:26 6
37:21 15
15:00 5
45:23 7
45:26 7
13:37 41
12:08 32
08:22 43
42:11 35
00:56 55
08:58 37
23:32 39
