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.Scanner;

public class Main {

	public static void main(String[] args) {
	      Scanner scan = new Scanner(System.in);
		  
		  while(scan.hasNextLine()) {
		     int i = scan.nextInt();
			 int j = scan.nextInt();
			 if(i == 0 && j == 0) break;
			 
			 if(i > j) {
				 i = i + j;
				 j = i - j;
				 i = i - j;
			 }
			 
			 System.out.println(i + " " + j);
			 scan.nextLine();
		  }
	   }

}