import java.util.Scanner;

public class Flowers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int countOfChrysanthemum = Integer.parseInt(scanner.nextLine());
        int countOfRoses = Integer.parseInt(scanner.nextLine());
        int countOfTulips = Integer.parseInt(scanner.nextLine());
        String season = scanner.nextLine();
        String day = scanner.nextLine();
        double springSummerPrice = countOfChrysanthemum * 2.00 + countOfRoses * 4.10 + countOfTulips * 2.50;
        double autumnWinterPrice = countOfChrysanthemum * 3.75 + countOfRoses * 4.50 + countOfTulips * 4.15;
        double priceAll = 0;

        if ("Spring".equals(season) || "Summer".equals(season)) {
            priceAll = springSummerPrice;

        } else if ("Autumn".equals(season) || "Winter".equals(season)) {
            priceAll = autumnWinterPrice;

        }
        if (day.equals("Y")) {
            priceAll = priceAll + (priceAll * 0.15);
        }
        if (countOfTulips > 7 && season.equals("Spring")) {
            priceAll = priceAll - (priceAll * 0.05);
        }
        if (countOfRoses >= 10 && season.equals("Winter")) {
            priceAll = priceAll - (priceAll * 0.10);
        }
        if ((countOfChrysanthemum + countOfRoses + countOfTulips > 20)) {
            priceAll = priceAll - (priceAll * 0.20);
        }
        System.out.printf("%.2f", priceAll + 2);
    }
}