using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            string month = Console.ReadLine();
            decimal price = 0;
            decimal totalSum = 0;
            int hours = int.Parse(Console.ReadLine());
            int people = int.Parse(Console.ReadLine());
            string time = Console.ReadLine();
            switch (month)
            {
                case "march":

                case "april":

                case "may":
                    price = time == "day" ? 10.50m : 8.40m;
                    break;
                case "june":
                case "july":
                case "august":
                    price = time == "day" ? 12.60m : 10.20m;
                    break;
                default:
                    break;
            }

            if (people >= 4)
            {
                price = price * 0.9m;
            }
            if (hours >= 5)
            {
                price = price * 0.5m;
            }
            totalSum = price * people * hours;
            Console.WriteLine($"Total cost of the visit: {price:f2}");
        }
    }
}