Enter data file name: calls.dat
file opened successfully.

Bert called Ernie at 0.15 per minute
   the call started at 12:10 and ended at 1:15
William called Steven at 0.09 per minute
   the call started at 1:00 and ended at 1:20
Mary called Ernie at 0.25 per minute
   the call started at 5:08 and ended at 5:26
Judith called Miles at 0.19 per minute
   the call started at 11:11 and ended at 12:00
Dan called YanYan at 1.10 per minute
   the call started at 7:00 and ended at 8:15


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