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.util.Scanner;

class Main {

	public void aa() {

		Scanner sc = new Scanner(System.in);

		int x = sc.nextInt();

		int y = sc.nextInt();

		while(x != 0 || y != 0) {

			if(x < y) {

				System.out.println(x + " " + y);

			} else {

				System.out.println(y + " " + x);

			}

			x = sc.nextInt();

			y = sc.nextInt();

		}

	}

	public static void main(String[] args) {

		new Main().aa();

	}

}