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 AOJ
{
    class Program
    {
        static void Main(string[] args)
        {

            for (int i = 1; ; i++)
            {
                var read = Console.ReadLine();
                var temp_string = read.Split(' ');
                int a = int.Parse(temp_string[0]), b = int.Parse(temp_string[1]);
                
                if(a==0&&b==0)
                {
                    break;
                }

                if (a < b)
                {
                    int temp = a;
                    a = b;
                    b = temp;
                }
                Console.WriteLine(a+" "+b);
            }
        }
    }
}