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 ITP1_3_C
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int j = 1; j < 3001; j++)
            {
                string[] strAry = Console.ReadLine().Split(' ');

                if (strAry[0] == "0" && strAry[1] == "0")
                    break;

                int v0 = int.Parse(strAry[0]);
                int v1 = int.Parse(strAry[1]);

                if (v0 <= v1)
                {
                    Console.WriteLine("{0} {1}", v0, v1);
                }
                else
                {
                    Console.WriteLine("{0} {1}", v1, v0);
                }
            }
        }
    }
}