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 sc = new Scanner(System.in);

      while (true){
        int x = sc.nextInt();
        int y = sc.nextInt();

          if (x == y && y == 0){
            break;
          }
          if (x <= y){
              System.out.println(x  + " " + y);
          } else {
            System.out.println(y  + " " + x);
          }
      }
  }
}