41:00
0
student
08:00
0
10:00
0
02:00
1
02:00
1
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0
11:00
0
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0
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0
18:00
0
10:00
0
12:00
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0
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0
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13:00
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37:00
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31:00
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03:00
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01:26
0
05:00
2
05:00
0
01:23
0
05:00
0
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0
05:00
0
06:00
0
01:21
0
02:00
0
02:00
0
02:00
1
06:00
0
01:18
2
01:20
2
05:00
0
05:00
2