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;

class P
{
    public static void Main()
    {
        
        for(int i = 0; i < 10000; i++)
        {
            string[] str = Console.ReadLine().Split(' ');
        
            int a = int.Parse(str[0]);
            int b = int.Parse(str[1]);
            
            if(a < b)
                Console.WriteLine(a + " " + b);
            else if(a > b)
                Console.WriteLine(b + " " + a);
            else if(a == 0 & b == 0)
                break;
            else if(a == b)
                Console.WriteLine(a + " " + b);
        }
    }
}