Problem:
Swapping Two Numbers

Write a program which reads two integers x and y, and prints them in ascending order.

Input

The input consists of multiple datasets. Each dataset consists of two integers x and y separated by a single space.

The input ends with two 0 (when both x and y are zero). Your program should not process for these terminal symbols.

Output

For each dataset, print x and y in ascending order in a line. Put a single space between x and y.

Constraints

0 ≤ x, y ≤ 10000

the number of datasets ≤ 3000

Sample Input

3 2
2 2
5 3
0 0

Sample Output

2 3
2 2
3 5

Solution in JAVA (judge verdict: Wrong Answer)

import java.util.*;

class Main{
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		while(true){
			int num1 = scan.nextInt();
			int num2 = scan.nextInt();
			
			if(num1 != 0 && num2 != 0){
				System.out.println(Math.min(num1,num2) + " " + Math.max(num1,num2));
			}
			else{
				break;
			}
		}
	}
}