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 scan = new Scanner(System.in);
            int[] x = new int[3000];
            int[] y = new int[3000];
            
            for(int i = 0; i < 3000; i++){
                x[i] = scan.nextInt();
                y[i] = scan.nextInt();
                
                if(x[i] == 0 && y[i] == 0)
                break;
                
                if(x[i] < y[i])
                System.out.println(x[i] + " " + y[i]);
                else
                System.out.println(y[i] + " " + x[i]);
            
        }
    }
}