2
2019/12/07-13:12:12
1980/01/01-00:01:01
12/07/2019-12:12:12am
12/31/1979-11:01:01am
Hint:
Note that 12:00:00pm means 12 noon(12:00:00 for 24-hour clock), and 12:00:00am means 12 before dawn(00:00:00 for 24-hour clock).
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