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: Wrong Answer)

import java.util.Scanner;

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

        Scanner as = new Scanner(System.in);
       
        int x;
        int y;
        int tr;

       
           
           x = as.nextInt();
           y = as.nextInt();
           
           if(x>y){
              tr=x;
               x=y;
              y=tr;
             }
            
           

        while(x!=0 && y!=0){
             
            System.out.println(x+" vaba"+y);

           x = as.nextInt();
           y = as.nextInt();
           
           if(x>y){
              tr=x;
               x=y;
              y=tr;
             }
 
       }
   
 }
 
}