You are parsing and printing workout durations.

Create a class TimeDuration that stores TWO ints: minutes and seconds.
- seconds should always be 0..59 (normalize when reading).

Input format for >> : two integers: minutes seconds (e.g., 3 15)
Output format for << : M:SS (e.g., 3:15, 0:05)

Requirements:
1) Default constructor sets minutes=0 and seconds=0
2) Overload operator>> to read minutes and seconds and normalize
3) Overload operator<< to print M:SS (SS must be 2 digits)

Do NOT write a main function.