When Do We Finish?

You are given the starting time of an event and its duration. Determine the time at which the event ends.

The input consists of several lines, each representing one event. The last line is 00:00 00:00 and must not be processed.

Each line contains two times separated by a space, both in hh:mm format. The first time is the event's start time, given as a valid 24-hour clock time. The second time is the duration: its minutes range from 0 to 59 inclusive, and its hours range from 0 to 96 inclusive.

For each input line, print on one line the time at which the event ends, as a valid 24-hour time in hh:mm format. If this time is not on the same day as the start time, print it in the format hh:mm +n, where n is the number of days after the starting day.