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: Time Limit Exceeded)

import java.util.Scanner;

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