using System;

public class Program

{

    public static void Main()

    {

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

        int i;

        int red = 0;

        int orange = 0;

        int blue = 0;

        int green = 0;

        for(i = 1; i <= n;i++);

        {

        string colour = Console.ReadLine();

            if (colour = "red")

                red++;

            if (colour = "orange")

                orange++;

            if (colour = "blue")

                blue++;

            if (colour = "green")

                green++;

    }

}