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;

public class Main{

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int p = 9;
int q = 0;
int counter = 1;
while (p != 0 || q != 0) {
p = scan.nextInt();
q = scan.nextInt();
if (p > q) {
System.out.println(q + " " + p);
} else {
System.out.println(p + " " + q);
}
counter++;
} 

}
}