10:00 0
teacher
10:00 
30:00 0
25:00 0
08:00
5
13:00
17
08:00
2
10:00
2
09:00
0
00:26
0
13:00
4
10:00
2
15:00
1
05:00
0
05:00
0
12:00
0
00:48
2
05:00
0
01:34
0
06:00
16
11:00
5
15:00
2
15:00
119
00:41
0
13:00
12
12:00
14
11:00
0
05:00
4
12:00
4
08:00
0
10:00
3
10:00
4
41:00
6
12:00
184
11:00
696
03:00
14
26:00
195
08:00
77
17:00
36
07:00
50
12:00
45
07:00
8
08:00
20
05:00
3
10:00
24
11:00
8
08:00
24
08:00
22
14:00
20
13:00
17
08:00
10