Write a program that computes the difference between two time
readings. The times are read into the program as 6-digit integers:
`hhmmss`, where `hh` stands for hour, `mm`
minutes and `ss` seconds. The difference should be displayed in
the same format. The difference can be both positive and negative. You
can assume, for now, that the inputs are correct (that is, you are not
going to have more than 59 seconds or more than 59 minutes).

Ex:

Enter first 6-digit time: 23245 Enter second 6-digit time: 32815 Time difference: 5530 Enter first 6-digit time: 123245 Enter second 6-digit time: 112955 Time difference: -10250

- The times expressed as a 6-digit integer can be larger than the
maximum size of a variable declared as
`integer`, so you will have to use a different data type (see page 87 of your book). - The best way to compute the difference is to:
- Isolate the diferent parts of each time: hours, minutes and
seconds (
`MOD`and`DIV`, hint, hint, hint). - Compute the time in terms of seconds (1 hour = 3600 seconds, 1 minute = 60 seconds).
- Compute the difference in seconds.
- Convert the above number into hours, minutes and seconds
(again
`MOD`and`DIV`, but with a different base, hint, hint, hint). *Build*the new 6-digit integer.

- Isolate the diferent parts of each time: hours, minutes and
seconds (