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

namespace Exam_Wedding_Investment
{
    class Program
    {
        static void Main(string[] args)
        {
            string contractTerm = Console.ReadLine();
            string contractType = Console.ReadLine();
            bool hasDesert = Console.ReadLine() == "yes";
            int paymentMonts = int.Parse(Console.ReadLine());
            double price = 0;
            switch (contractTerm)
            {
                case "one":
                    switch (contractType)
                    {
                        case "Small": price = 9.98; break;
                        case "Middle": price = 18.99; break;
                        case "Large": price = 25.98; break;
                        case "ExtraLarge": price = 35.99; break;
                    }
                    break;
                case "two":
                    switch (contractType)
                    {
                        case "Small": price = 8.58; break;
                        case "Middle": price = 17.09; break;
                        case "Large": price = price = 23.59; break;
                        case "ExtraLarge": price = 31.79; break;
                    }
                    break;
            }

            if (hasDesert)
            {
                price += price <= 10 ? 5.50 : price <= 30 ? 4.35 : 3.85;
            }
            price *= paymentMonts;

            if (contractTerm == "two")
            {
                price *= 0.9625;
            }
            Console.WriteLine($"{price:F2} lv.");

        }
    }
}