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)

//ITP1_3_C

using System;
using System.Collections.Generic;
/*using System.Linq;
using System.Text;
using System.Threading.Tasks;*/

class Program { 
    static void Main(string[] args)
    {
        int i = 0;
        while (i++ < 3000) {

            //?????????????????????????????????int??????iaaray????????????????????\

            int[] iarray = Array.ConvertAll<string, int>((Console.ReadLine().Split(' ')), delegate (string value)
            {
                return int.Parse(value);
            });

            if (iarray[0] == 0 && iarray[1] == 0)       //??\??????????????¨???0????????????
                break;

            Array.Sort(iarray);             //???????????§???????????????
            Console.WriteLine(iarray[0] +" "+ iarray[1]);
        }
    }

}