00:48
0
teacher
00:48 
00:34
0
01:34
0
03:46
1
03:08
1
01:41
6
02:43
0
01:14
0
01:07
0
01:33
0
02:27
1
01:59
0
02:12
0
01:51
0
01:21
3
03:25
1
01:58
0
03:15
0
00:25
0
01:15
0
05:22
0
04:40
0
04:55
0
00:25
0