package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String year = scanner.nextLine();
        String type = scanner.nextLine();
        String dessert = scanner.nextLine();
        int months = Integer.parseInt(scanner.nextLine());
        double price = 0.0;
        double totalPrice = 0.0;

        switch (year) {
            case "one":
                if (type.equals("Small" )) {
                    price = 9.98;
                } else if (type.equals("Middle" )) {
                    price = 18.99;
                } else if (type.equals("Large" )) {
                    price = 25.98;
                } else if (type.equals("ExtraLarge" )) {
                    price = 35.99;
                }
                break;
            case "two":
                if (type.equals("Small" )) {
                    price = 8.58;
                } else if (type.equals("Middle" )) {
                    price = 17.09;
                } else if (type.equals("Large" )) {
                    price = 23.59;
                } else if (type.equals("ExtraLarge" )) {
                    price = 31.79;
                }
                break;
        }

        double dessertPrice = 0.0;

        if (dessert.equals("yes" )) {
            if (price <= 10) {
                dessertPrice = 5.5;
            } else if (price <= 30) {
                dessertPrice = 4.35;
            } else if (price > 30) {
                dessertPrice = 3.85;
            }

        }


        totalPrice = (price + dessertPrice) * months;

        if (year.equals("two" )) {
            totalPrice = totalPrice * 0.375;

        }


        System.out.printf("%.2f lv.", totalPrice );
    }


}