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 ITP1
{
    class ITP1_3_C
    {
        static void Main(string[] args)
        {
            int i=0;
            int[][] input = new int[1000000][];

            
            while (true)
            {

                input[i] = new int[2];
                string[] suchi = Console.ReadLine().Split(' ');
                input[i][0] = int.Parse(suchi[0]);
                input[i][1] = int.Parse(suchi[1]);
                 if (input[i][0] == 0 & input[i][1] == 0) break;
                i++;
                
            }
            for (int t = 0; t < i ; t++)
            {
                if (input[t][0] > input[t][1])
                {
                    Console.WriteLine(input[t][1]+" "+ input[t][0]);
                }
                else
                {
                    Console.WriteLine(input[t][0] + " " + input[t][1]);
                }

            }
        }
    }
}