using System;


class flowers
{
    static void Main()
    {
        double purchasedChrysanthemums = double.Parse(Console.ReadLine()); // броят на закупените хризантеми

        double purchasedRoses = double.Parse(Console.ReadLine()); // броят на закупените рози

        double purchasedTulips = double.Parse(Console.ReadLine()); // броят на закупените лалета

        double flowersSum = purchasedChrysanthemums + purchasedRoses + purchasedTulips; // zakupeni cvetq obsto

        string season = Console.ReadLine(); // сезон

        string holydayOrNot = Console.ReadLine(); // дали денят е празник

        //   double heatPrice = purchasedChrysanthemums * 2.00 + purchasedRoses * 4.10 + purchasedTulips * 2.50; // prolet / lqto

        //   double coldPrice = purchasedChrysanthemums * 3.75 + purchasedRoses * 4.50 + purchasedTulips * 4.15; // esen / zima

        // double holydayHeat = heatPrice * 15 / 100; // 6.06 лв
        //  double holydayCold = coldPrice * 15 / 100;
        double coldPrice = 0;
        double heatPrice = 0;
        double tulipsPercentage = 0;
        double rosesPercentage = 0;
        double flowersPercentage = 0;

        if (season == "Summer" || season == "Spring")
        {
            heatPrice = purchasedChrysanthemums * 2.00 + purchasedRoses * 4.10 + purchasedTulips * 2.50; // prolet / lqto
            if (holydayOrNot == "Y")
            {
                double holydayHeat = heatPrice * 15 / 100; // 6.06 лв
                heatPrice = heatPrice + holydayHeat; // 46.46 лв.

            }

            if (purchasedTulips > 7 && season == "Spring")
            {
                tulipsPercentage = heatPrice * 5 / 100;
                heatPrice = heatPrice - tulipsPercentage;


            }
            if (flowersSum > 20)
            {
                flowersPercentage = heatPrice * 20 / 100;
                heatPrice = heatPrice - flowersPercentage;
            }
            Console.WriteLine("{0:F2}", heatPrice + 2);
        }
        else if (season == "Winter" || season == "Autumn")
        {
            coldPrice = purchasedChrysanthemums * 3.75 + purchasedRoses * 4.50 + purchasedTulips * 4.15; // esen / zima
            if (holydayOrNot == "Y")
            {
                double holydayCold = coldPrice * 15 / 100;
                coldPrice += holydayCold;
            }
            if (purchasedRoses >= 10 && season == "Winter")
            {
                rosesPercentage = coldPrice * 10 / 100;
                coldPrice = coldPrice - rosesPercentage;
            }
            if (flowersSum > 20)
            {
                flowersPercentage = coldPrice * 20 / 100;
                coldPrice = coldPrice - flowersPercentage;
            }
            Console.WriteLine("{0:F2}", coldPrice + 2);
        }
    }
}