//xxx.java

import java.util.Scanner;
import java.io.PrintWriter;

/**
 * xxx
 */
public class xxx
{
    private static Scanner keyboard = new Scanner(System.in);
    private static PrintWriter screen = new PrintWriter(System.out, true);
    private xxx xxx;

    public static void main(String[] args)
    {
        xxx xxx;

        xxx;
    }
}