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 main(String[] args){
		Scanner a = new Scanner(System.in);
		int b = a.nextInt();
		int c = a.nextInt();
		while(b > 0 && c > 0){
			System.out.println("sss");
		if(b < c)
			System.out.println(b+" "+c);
		else if(b > c)
			System.out.println(c+" "+b);
		else 
			System.out.println(c+" "+b);
		b = a.nextInt();
		c = a.nextInt();
		}
	}

}