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 C# (judge verdict: Accepted)

using System;

namespace SwappingTwoNumbers
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			int i = 0;

			while(true)
			{
				string input = Console.ReadLine();
				char[] CharSeparators = new char[] {' '};
				string[] array = input.Split(CharSeparators);
				string array1 = array[0];
				string array2 = array[1];
				int x = int.Parse (array1);
				int y = int.Parse (array2);

				i++;
				if(x==0&&y==0)
					break;
				if (x > y)
					Console.WriteLine(y + " " + x);
				else
					Console.WriteLine(x + " " + y);
			}



		}
	}
}