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 JAVA (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line = null;
		while ((line = br.readLine()) != null) {
			String[] arr = line.split(" ");
			if ("0".equals(arr[0]) && "0".equals(arr[1]))
				break;
			int a = Integer.parseInt(arr[0]);
			int b = Integer.parseInt(arr[1]);

			if (a > b)
				System.out.println(b + " " + a);
			else
				System.out.println(a + " " + b);
		}
	}
}