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;
using System.Collections.Generic;
class Program
{
	static void Main(string[] args)
	{
		int t = 0;
		while(t==0){
			string[] str = Console.ReadLine().Split(' ');
			int x = int.Parse(str[0]);
			int y = int.Parse(str[1]);
			if(x==0 && y==0){
				t = 1;
			} else {
				string s = "";
				if(x > y){
					s = y + " " + x;
				} else {
					s = x + " " + y;
				}
				Console.WriteLine(s);
			}
		}
	}
}