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using System;

namespace Mobile_operator
{
    class Program
    {
        static void Main(string[] args)
        {
            string term = Console.ReadLine();
            string typeContract = Console.ReadLine();
            string internet = Console.ReadLine();
            double countMounth = double.Parse(Console.ReadLine());
            double tax = 0;

            if (term=="one")
            {
                if (typeContract=="Small")
                {
                    tax = 9.98;
                }
                else if (typeContract == "Middle")
                {
                    tax = 18.99;
                }
                else if (typeContract == "Large")
                {
                    tax = 25.98;
                }
                else if (typeContract == "ExtraLarge")
                {
                    tax = 35.99;
                }
            }
            if (term == "two")
            {
                if (typeContract == "Small")
                {
                    tax = 8.58;
                }
                else if (typeContract == "Middle")
                {
                    tax = 17.09;
                }
                else if (typeContract == "Large")
                {
                    tax = 23.58;
                }
                else if (typeContract == "ExtraLarge")
                {
                    tax = 31.79;
                }
            }
            if (internet=="yes")
            {
                if (tax<=10)
                {
                    tax = tax + 5.50;
                }
                else if (tax<=30)
                {
                    tax = tax + 4.35;
                }
                else if (tax>30)
                {
                    tax = tax + 3.85;
                }
            }
            double price = (countMounth * tax);
            double discount = 0;
            if (term=="two")
            {
                discount= price * 0.0375;
                price = price - discount;

            }

            Console.WriteLine($"{price:f2} lv.");


        }
    }
}