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: Accepted)

import java.util.*;
 
public class Main {
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);          
	
	while(true){
        int a = sc.nextInt();
        int b = sc.nextInt();
        
        if(a == 0 && b == 0){
	 break;
	 }
         System.out.println(Math.min(a,b) + " " + Math.max(a,b));
	}
	}
}