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

namespace Mobilen_ooperator
{
    class Program
    {
        static void Main(string[] args)
        {
            string srok = Console.ReadLine();
            string tip = Console.ReadLine();

            string yesNo = Console.ReadLine();
            double numb = double.Parse(Console.ReadLine());
            double total = 0;
            double cena = 0;

            if (srok == "one")
                if (tip == "Small")

                { cena = 9.98;

                }
            if (srok == "two")
                if (tip == "Small")

                {
                    cena = 8.58;

                }

            if (srok == "one")
                if (tip == "Middle")

                {
                    cena = 18.99;

                }
            if (srok == "two")
                if (tip == "Middle")

                {
                    cena = 17.09;

                }
            if (srok == "one")
                if (tip == "Large")

                {
                    cena = 25.98;

                }
            if (srok == "two")
                if (tip == "Large")

                {
                   cena = 23.59 ;

                }

            if (srok == "one")
                if (tip == "ExtraLarge")

                {
                    cena = 35.99;

                }
            if (srok == "two")
                if (tip == "ExtraLarge")

                {
                    cena = 31.79;

                }

            total = cena * numb;
            if (yesNo == "yes")
                if (numb <= 10)

                {
                    total = (cena + 5.50) * numb;
                }
            if (yesNo == "yes")
                if (numb > 10 && numb <= 30)

                {
                    total = (cena + 4.35) * numb;
                }

            if (yesNo == "yes")
                if (numb > 30)

                {
                    total = (cena + 3.85) * numb;
                }
            if (srok == "two")
            {
                total = total - (total * 3.75 /100)  ;
            }
                Console.WriteLine("{0:f2} lv.", total);
        }
    }
}