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 {
	
	private void calc(){
		Scanner scanner = new Scanner(System.in);
		short i=1;
		while(true){
			int x=scanner.nextInt();
			int y=scanner.nextInt();
			int temp;
			
			if(x==0 && y==0)break;
			
			if(y<x){
				temp=x;
				x=y;
				y=temp;
			}
			System.out.print(x+" ");
			System.out.println(y);
			i++;
			
		}
		
	}
	
	public static void main(String[] args) {
		Main run =new Main();
		run.calc();

	}
}