using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter grade value (A, B, C, D, F");

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

        switch (grade)

        {

            case 'A':

            Console.WriteLine("100-95");

            break;

​

            case 'B':

            Console.WriteLine("94-85");

            break;

            case 'C':

            Console.WriteLine("84-75");

            break;

            case 'F':

            Console.WriteLine("74 below");

            break;

        }

        Console.ReadKey();

​

    }

}