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.*;                                                                                  

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        for(int i = 0; i < 3000; i++) {
          String line = sc.nextLine();
          String[] l = line.split(" ");
          int x = Integer.parseInt(l[0]);
          int y = Integer.parseInt(l[1]);

          if(x == 0 && y == 0) {
            break;
          }   

          if(x <= y) {
            System.out.println(x + " " + y); 
          } else {
            System.out.println(y + " " + x); 
          }   
        }   
    }   
}