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;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace ConsoleApplication32
{
    class Program
    {  
      static void Main()
      {
		  while(true)
		  {
		  var a = Console.ReadLine().Split().Select(int.Parse).ToArray();
		  if(a[0]==0&&a[1]==0)
		  break;
		  Array.Sort(a);
		  Console.WriteLine("{0} {1}",a[0],a[1]);
	  }
		}
	 }
 }