12:00
0
student
12:00 
30:00
0
32:00
0
17:00
0
27:00
0
05:00
0
25:00
0
11:00
0
12:00
0
11:00
0
20:00
0
10:00
0
13:00
0
16:00
0
12:00
0
21:00
0
11:00
0
12:00
0
10:00
0
22:00
0