using System;

​

public class Program

{

    public static void Main()

    {

        string city = Console.ReadLine();

        string item = Console.ReadLine();

        int count = int.Parse(Console.ReadLine());

        if (city == "Varna")

            if (item == "coffee")

            {

                double price = count * 0.45;

                Console.WriteLine(price);

            }

            else if (item == "water")

            {

                double price = count * 0.70;

                Console.WriteLine(price);

                if (item == "beer")

                {

                    price = count * 1.10;

                    Console.WriteLine(price);

                }

                else if (item == "sweets")

                {

                    price = count * 1.35;

                    Console.WriteLine(price);

                }

                else if (item == "peanuts")

                {

                    price = count * 1.55;

                    Console.WriteLine(price);

                    if (city == "Plovdiv")

                    {

                    }

​

                    if (item == "coffee")

                    {

                        price = count * 0.40;

                        Console.WriteLine(price);

                        if (item == "water")

                        {

                            price = count * 0.70;

                            Console.WriteLine(price);

                            if (item == "beer")

                            {

                                price = count * 1.15;

                                Console.WriteLine(price);

                                if (item == "sweets")

                                {

                                    price = count * 1.30;

                                    Console.WriteLine(price);

                                    if (item == "peanust")

                                    {

                                        price = count * 1.50;

                                        Console.WriteLine(price);

                                        if (city == "Sofiq")

                                        {

                                        }

​

                                        if (item == "coffee")

                                        {

                                            price = count * 0.50;

                                            Console.WriteLine(price);

                                            if (item == "water")

                                            {

                                                price = count * 0.80;

                                                Console.WriteLine(price);

                                                if (item == "beer")

                                                {

                                                    price = count * 1.20;

                                                    Console.WriteLine(price);

                                                    if (item == "sweets")

                                                    {

                                                        price = count * 1.45;

                                                        Console.WriteLine(price);

                                                        if (item == "peanuts")

                                                        {

                                                            price = count * 1.60;

                                                            Console.WriteLine(price);

                                                        }

                                                    }

                                                }

                                            }

                                        }

                                    }

                                }

                            }

                        }

                    }

                }

            }

    }

}