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 static void main(String[] args){
        Scanner scanner = new Scanner(System.in);

        int[][] array = new int[3000][2];
        int x, y;
        int counter = 0;
        while(true){
            x = scanner.nextInt();
            y = scanner.nextInt();
            if(x == 0 && y == 0)break;
            array[counter][0] = x;
            array[counter][1] = y;
            counter++;
        }
        for(int i = 0; i < counter; i++){
            if(array[i][0]>array[i][1])
                System.out.println(array[i][1]+" "+array[i][0]);
            else
                System.out.println(array[i][0]+" "+array[i][1]);
        }
    }
}