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**

2

1

Problem Setter: Md. Helal Uddin