using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("input L R U D : ");

        string input = Console.ReadLine();

        int L=-1;

        int R=1;

        int U=1;

        int D=-1;

        for(int i=0; ; i++){

        }

        if(L==R){

        }

            Console.WriteLine();

    }

}