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.io.*;
import java.util.*;

class Main{
  public static void main(String[] args) throws IOException{
    Scanner scan=new Scanner(System.in);
    int[] x=new int[3000];
    int[] y=new int[3000];
    int count=0;

    for(int i=0;i<x.length;i++){
      x[i]=Integer.parseInt(scan.next());
      y[i]=Integer.parseInt(scan.next());
      if(x[i]==0 && y[i]==0){
        break;
      }
      count++;
    }

    Arrays.sort(x);
    Arrays.sort(y);

    for(int i=x.length-count;i<x.length;i++){
      System.out.println(x[i]+" "+y[i]);
    }
  }
}