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 AOJ
{
    public static void Main()
    {
  
        while (true)
        {
          
String[] st=Console.ReadLine().Split(' ');
            int a = int.Parse(st[0]);
int b=int.Parse(st[1]);
            if (a==0&&b == 0)
                break;
int oki;
if(a>b){
oki=a;
a=b;
b=oki;

}

            Console.WriteLine(a+" "+b);
        
}


    }

}