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 ManyHelloWorld
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			while (true){
				int[] data = getInputdata(" ");
				if (data[0] == 0 && data[1] == 0)
					break;

				Console.WriteLine ((data[0] > data[1])?"{1} {0}": "{0} {1}", data[0], data[1]);
			}
		}
		public static int[] getInputdata (string token)
		{
			string[] data = Console.ReadLine ().Split (token.ToCharArray ());
			int[] idata = new int[data.Length];

			for (int i = 0; i < data.Length; i++) {
				idata [i] = int.Parse (data [i]);
			}
			return idata;
		}


	}
}