403 - Subtraction game

Subtraction game

Time Limit: 1 sec


The Problem

Nezam is a student of BGCTUB, Dept. of CSE. He is first boy of his semester and also a good mathematician. He would like to play subtraction game. In this game given two integers a and b. If any player find the absolute differences of the numbers, then the player will win the game. So can you help him to find the difference?


The Input

Input file contains a series of line. Each line consist of two integers a and b separated by a blank space.


The Output

For each line of input you have to print the difference between the integers in a line.


Sample Input

10 8

100 99


Sample Output







Problem Setter: Md. Helal Uddin