using System;

public class Program

{

    public static void Main(string[] args)

    {

        char grade;

        Console.WriteLine("Enter the grade");

        grade=Convert.ToChar(Console.ReadLine());

        switch(grade){

        case 'A':

        Console.WriteLine("Excellent");

        break;

        case 'B':

        Console.WriteLine("Good");

        break;

                case 'C':

        Console.WriteLine("Well done");

        break;

                        case 'D':

        Console.WriteLine("you passed");

        break;

            default:

                Console.WriteLine("Invalid Grade");

                break;

        }

    }

}