19:18 0
real teacher
19:18 
36:14 0
09:00 0
09:49 0
01:00:09 0
12:40 0
29:46 0
11:28 0
15:30 0
06:05 0
48:29 0
15:34 0
20:28 0
19:41 0
31:18 0
