help from a teacher

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17:30
07:59
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37:29
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12:00
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35:13
07:59
13:25
15:00
10:31
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41:36
15:56
07:59
11:59
10:44
20:59
10:14
04:56
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08:00
11:27
15:00
07:05
13:18
24:22
27:19
12:54
06:37
10:36
11:36
10:02
26:18
12:00