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.io.*;

class Main {
	public static void main(String[] args) {
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			String buf = br.readLine();

			while(true){
			 String[] line = buf.split(" ");
			 int x = Integer.parseInt(line[0]);
			 int y = Integer.parseInt(line[1]);			
				if( x ==0 && y == 0) break;
				if( x > y ){
					System.out.print(y+" "+x);
					break;
				} else if( x < y ) {
					System.out.print(x+" "+y);
					break;
				} 
			}
		} catch(Exception e){
		}
	} 
}