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;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    while(true){
      String str = sc.nextLine();
      String[] str2 = str.split(" ");
      int[] x = new int[2];
      for (int i = 0; i < 2; i++){
        x[i] = Integer.parseInt(str2[i]);
      }
      if(x[0] == 0 && x[1] == 0){
        break;
      }
      Arrays.sort(x);
      System.out.println(x[0] + " " + x[1]);
    }
  }
}