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.io.BufferedReader;
import java.io.InputStreamReader;


public class Main {
	public static void main(String[] args) throws Exception {
try {
	BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
	String input = buf.readLine();
	
	while(true){
		String[] strAry = input.split(" ");
	       int x = Integer.parseInt(strAry[0]);
	       int y = Integer.parseInt(strAry[1]);
		if(x == 0 && y == 0){
			break;
		}
		if(x > y){
		int chg = x;
		x = y;
		y = chg;
		}		
		System.out.println(x + " " + y);
		input =buf.readLine();
	}
} catch (Exception e) {
	// TODO: handle exception
}
		 }
    }