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: Wrong Answer)

using System;
namespace csharptest
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] str = Console.ReadLine().Split(' ');
            int[] a = new int[100000];
            int[] b = new int[100000];
            int n;
            for (n = 0; str[0] == "0" && str[1] == "0"; n++)
            {
                a[n] = int.Parse(str[0]);
                b[n] = int.Parse(str[1]);
                if (a[n] > b[n])
                {
                    int t = a[n];
                    a[n] = b[n];
                    b[n] = t;
                }
                str = Console.ReadLine().Split(' ');
            }
            for (int m = 0; m < n; m++)
            {
                Console.WriteLine(a[m] + " " + b[m]);
            }
        }
    }
}