using System;

​

public class Program

{

    public static void Main()

    {

        char s;

        int sumh = 0, sumd = 0, counth = 0, countd = 0, grade = 0;

        for (int i = 0; i < 4; i++)

        {

            Console.WriteLine("enter a school then grade");

            s = char.Parse(Console.ReadLine());

            grade = int.Parse(Console.ReadLine());

            if (s == 'H')

            {

                counth += 1;

                sumh += grade;

            }

            else if (s == 'h')

            {

                counth += 1;

                sumh += grade;

            }

            else if (s == 'D')

            {

                countd += 1;

                sumd += grade;

            }

            else if (s == 'd')

            {

                countd += 1;

                sumd += grade;

            }

            else

            {

                Console.WriteLine("ERROR");

            }

        }

​

        Console.WriteLine("h av is {0} d av is {1} ", (double)sumh / counth, (double)sumd / countd);

    }

}