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 ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] count = new int[2];
            for (int i = 0; ; i++)
            {
                var n = Console.ReadLine().Split(' ');
                count[0] = int.Parse(n[0]);
                count[1] = int.Parse(n[1]);
                if (count[0] == 0 && count[1] == 0) { break; }
                if (count[0] < count[1])
                {
                    Console.WriteLine($"{count[0]} {count[1]}");
                }
                else
                {
                    Console.WriteLine($"{count[1]} {count[0]}");
                }
            }
            Console.ReadKey();
        }
    }
}