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 swap(int a,int b){
		int x;
		x=a;
		a=b;
		b=x;
		System.out.println(a + " "+ b);
		return;
	}
	
  public static void main(String[] args) {
	  Scanner sc=new Scanner(System.in);
	  
	  int n=Integer.MAX_VALUE;
	  
	  for(int i=0;i<n;i++){
		  int x=Integer.parseInt(sc.next());
		  int y=Integer.parseInt(sc.next());
		  if(x==0&&y==0){
			  break;
		  }
		  else{
		  swap(x,y);
		  }
	  }
    
  }
}