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) {
		int rows = 4;
		int columns = 2;
		Scanner s = new Scanner(System.in);
		int[][] sort = new int[rows][columns];
		sort[0][0] = s.nextInt();
		sort[0][1] = s.nextInt();
		s.nextLine();
		sort[1][0] = s.nextInt();
		sort[1][1] = s.nextInt();
		s.nextLine();
		sort[2][0] = s.nextInt();
		sort[2][1] = s.nextInt();
		s.nextLine();
		sort[3][0] = s.nextInt();
		sort[3][1] = s.nextInt();

		for (int i = 0; i < rows; i++) {
			for (int j = 0; j < columns - 1; j++) {
				if (sort[i][j] >= 0 && sort[i][j + 1] <= 10000) {
					if (sort[i][j] != 0 && sort[i][j + 1] != 10000) {
						if (sort[i][j] < sort[i][j + 1]) {
							System.out.println(sort[i][j] + " " + sort[i][j + 1]);
						} else {
							System.out.println(sort[i][j + 1] + " " + sort[i][j]);
						}
					}

				}

			}
		}

	}
}