08:00 0
teacher
08:00 23:00
0
06:00
1
29:00
2
06:00
1
05:00
1
11:00
2
20:00
2
08:00
4
16:00
0
20:00
1
06:00
0
10:00
2
28:00
1
29:00
0
28:00
1
30:00
1
10:00
1
08:00
2
06:00
1
01:30
1
06:00
1
10:00
4
29:00
1
12:00
1
21:00
2
00:15
1
07:00
0
07:00
1
21:00
0
02:00
0
06:00
1
08:00
2
12:00
1
23:00
1
10:00
1