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;                                                   
import java.util.Arrays;
   
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        
        while(true) {
            int x = scan.nextInt(), y = scan.nextInt();
            int[] data = {x, y};
            Arrays.sort(data);     
            if(x == 0 && y == 0) break;
            else {
                System.out.println(data[0] + " " + data[1]);
            } 
        } 
    } 
}