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.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class Main {

	public static void main(String[] args) throws IOException{
		
		InputStreamReader isr= new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(isr);
		List<Integer>intList = new ArrayList<Integer>();
		String[] strList;
		
		do {
			String strINputNum = br.readLine();
			strList = strINputNum.split(" ");
			
			int intNumX = Integer.parseInt(strList[0]);
			int intNumY = Integer.parseInt(strList[1]);
			
			intList.add(intNumX);
			intList.add(intNumY);
			
		}while(!(strList[0].equals("0") && strList[1].equals("0")));
		
		 int intEndCount = intList.size()-2;
		
		for(int i = 0; i < intEndCount; i = i + 2) {
			int intX= intList.get(i);
			int intY= intList.get(i +1);
			
			if(intX < intY) {
				System.out.println(intX + " " + intY);
			}else {
				System.out.println(intY + " " + intX);
			}
		}
	}
}