import java.io.*;
import java.util.*;
/*
 *  java program model for www.programming-challenges.com
 */

class Main{
	// Judge entry point
	public static void main(String args[]) // entry point from OS
	{
		MySolution solver = new MySolution();
		solver.run(); // execute
	}
}

class MySolution implements Runnable {
	private BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
	
	public void run(){
		// TODO: Use input.readLine() to read the lines of the input
		
		// TODO: Solve the problem
		
		// TODO: Write output to System.out
	}
}