public class MyClass {
    public static void main(String args[]) {
        java.util.Scanner scanner = new java.util.Scanner(System.in);
        String fruit = scanner.nextLine();
        String setSize = scanner.nextLine();
        int numberOfSets = scanner.nextInt();

        double watermelonPrice = 0.0;
        double mangoPrice = 0.0;
        double pineapplePrice = 0.0;
        double raspberryPrice = 0.0;

        if (setSize.equals("small")) {
            watermelonPrice = 56.00 * 2;
            mangoPrice = 36.66 * 2;
            pineapplePrice = 42.10 * 2;
            raspberryPrice = 20.00 * 2;
        } else {
            watermelonPrice = 28.70 * 5;
            mangoPrice = 19.60 * 5;
            pineapplePrice = 24.80 * 5;
            raspberryPrice = 15.20 * 5;
        }

        double totalPrice = 0.0;

        switch(fruit) {
            case "Watermelon" : totalPrice = watermelonPrice * numberOfSets;
            break;
            case "Mango" : totalPrice = mangoPrice * numberOfSets;
            break;
            case "Pineapple" : totalPrice = pineapplePrice * numberOfSets;
            break;
            case "Raspberry" : totalPrice = raspberryPrice * numberOfSets;
            break;
        }

        if (totalPrice >= 400 && totalPrice <= 1000) {
            totalPrice = totalPrice * 0.85;
        } else if (totalPrice < 400)  {
            totalPrice = totalPrice;
        } else {
            totalPrice = totalPrice * 0.5;
        }
        System.out.printf("%.2f lv.",totalPrice);
    }
}