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.Linq;
class Program
{
    static void Main(string[] args)
    {
        while (true)
        {
            string[] input = Console.ReadLine().Split(' ');
            int b = int.Parse(input[0]);
            int c = int.Parse(input[1]);
            int[] output = new int[]{ b, c };
            if (b == 0 && c == 0) break;

               var d = from p in output orderby p select p;
               Console.WriteLine(string.Join(" ", d));
            
            
        }
    }
}