Problem Description

Given a start time and an end time, you need to find how long the time interval between them is.

It is guaranteed that the time interval is at least $1$ second and at most $24$ hours.

Input Format

The input consists of two lines. Each line contains a string, representing the start time and the end time, respectively. The format is hh:mm:ss (hours, minutes, seconds).

The input guarantees that the hour is an integer in the range $0\sim 23$, and the minutes and seconds are integers in the range $0\sim 59$.

Output Format

Output one line with a string representing the length of the interval, in the same format as the input.

20:00:00
04:00:00

08:00:00

12:34:56
14:36:22

02:01:26

Hint

Notes

This problem is translated from COCI2006-2007 CONTEST #5 T2 NATRIJ.

Translated by ChatGPT 5