166-delta-time

Delta Time

Challenge Description:

You are given the pairs of time values. The values are in the HH:MM:SS format with leading zeros. Your task is to find out the time difference between the pairs.

Input sample:

The first argument is a file that contains lines with the time pairs.

For example:

14:01:57 12:47:11
13:09:42 22:16:15
08:08:06 08:38:28
23:35:07 02:49:59
14:31:45 14:46:56

Output sample:

Print to stdout the time difference for each pair, one per line. You must format the time values in HH:MM:SS with leading zeros.

For example:

01:14:46
09:06:33
00:30:22
20:45:08
00:15:11