12:00
0
first-time
12:00 
10:00
0
10:00
0
13:00
0
16:00
0
10:00
0
11:00
1
12:00
0
10:00
0
10:00
0
10:00
1
12:00
0
05:00
0
05:00
0
10:00
0
32:00
0
13:00
0
34:00
1
24:00
2
13:00
0