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.Scanner;

public class Main{
    public static void main(String[] args){
    	int x;
    	int y;
    	Scanner sc = new Scanner(System.in);
    	while(true){
    		x=sc.nextInt();
    		y=sc.nextInt();
    		if(x==0 && y==0)
    		break;
    		if(x<y){
    			System.out.print(x+" "+y);
    		}else{
    			System.out.print(y+" "+x);
    		}
    		}
    }
    }