using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Console.Write("Enter grade1");

        string g = Console.ReadLine();

        char grade = char.Parse(g);

        Console.Write("Enter grade2");

        string r = Console.ReadLine();

        char grade2 = char.Parse(r);

        Console.Write("Enter grade3");

        string a = Console.ReadLine();

        char grade3 = char.Parse(a);

        Console.Write("Enter grade4");

        string d = Console.ReadLine();

        char grade4 = char.Parse(d);

        Console.Write("Enter grade5");

        string e = Console.ReadLine();

        char grade5 = char.Parse(e);

​

        switch (grade){

        case 'A':

        case 'a':

                Console.Write("Exellent");

        break;

        case 'B': 

        case 'b':

                Console.Write("Very good");

        break;

        case 'C': 

        case 'c':

                Console.Write("Good");

        break;

        case 'D': 

        case 'd':

                Console.Write("Not bad");

        break;

                case 'E': 

        case 'e':

                Console.Write("Pass");

        break;

        default:

        Console.Write("Fail");

        break;

        }

      Console.ReadLine();   

    }

}