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;
class Tester
{
    static void Main()
    {
        int a, b = 0;

        for (int i = 0; ; i++)
        {
            string x = Console.ReadLine();
            string[] result;

            const char Space = ' ';
            char[] delimiters = new char[] { Space };
            result = x.Split(delimiters);

            a = int.Parse(result[0]);
            b = int.Parse(result[1]);

            if (a == 0 && b == 0)
                break;
            if (a < b)
                Console.WriteLine("{0} {1}", a, b);
            if (a > b)
                Console.WriteLine("{0} {1}", b, a);
        }
    }
}