using System;

namespace EnergyBooster
{
    class Program
    {
        static void Main(string[] args)
        {
            // Input gel type
            // Input package size
            // Input packages count
            // Calculate money needed
            // If money >= 400 && money <= 1000, money *= 0.85
            // Else if money > 1000, money *= 0.5
            // Print output

            string gelType = Console.ReadLine();
            string packageSize = Console.ReadLine();
            int packagesCount = int.Parse(Console.ReadLine());

            double moneyNeeded = 0;

            switch (packageSize)
            {
                case "small":

                    switch (gelType)
                    {
                        case "Watermelon":
                            moneyNeeded = 56 * 2;
                            break;

                        case "Mango":
                            moneyNeeded = 36.66 * 2;
                            break;

                        case "Pineapple":
                            moneyNeeded = 42.1 * 2;
                            break;

                        case "Raspberry":
                            moneyNeeded = 20 * 2;
                            break;
                    }
                    break;

                case "big":

                    switch (gelType)
                    {
                        case "Watermelon":
                            moneyNeeded = 28.7 * 5;
                            break;

                        case "Mango":
                            moneyNeeded = 19.6 * 5;
                            break;

                        case "Pineapple":
                            moneyNeeded = 24.8 * 5;
                            break;

                        case "Raspberry":
                            moneyNeeded = 15.2 * 5;
                            break;
                    }
                    break;
            }

            moneyNeeded *= packagesCount;

            if (moneyNeeded >= 400 && moneyNeeded <= 1000)
            {
                moneyNeeded *= 0.85;
            }

            else if (moneyNeeded > 1000)
            {
                moneyNeeded *= 0.5;
            }

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