using System;
using System.IO;
using System.Linq;

class Program
{
    public static void Main()
    {
        string FilePath = Console.ReadLine();

        while (File.Exists(FilePath) == false)
        {
            Console.WriteLine("File not found, enter a vaild file path.");
            FilePath = Console.ReadLine();
        }
        string FileContent = File.ReadAllText(FilePath);

        Console.WriteLine("Grades are: {0}", FileContent);

        int resultA = FileContent.Count(c => c == 'A');
        int resultB = FileContent.Count(c => c == 'B');
        int resultC = FileContent.Count(c => c == 'C');
        int resultD = FileContent.Count(c => c == 'D');
        int resultE = FileContent.Count(c => c == 'E');
        int resultF = FileContent.Count(c => c == 'F');


        Console.WriteLine("{0}", resultA);


        Console.ReadLine();
    }
}