import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Bakery {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String sweet = reader.readLine();
        int countSweets = Integer.parseInt(reader.readLine());
        int dayOfMonth = Integer.parseInt(reader.readLine());

        double price = 0;
        if (dayOfMonth <= 15) {
            if (sweet.equals("Cake")) {
                price = 24 * countSweets;
            } else if (sweet.equals("Souffle")) {
                price = 6.66 * countSweets;
            } else if (sweet.equals("Baklava")) {
                price = 12.60 * countSweets;
            }
            price = price * 0.90;
        } else if (dayOfMonth > 15) {
            if (sweet.equals("Cake")) {
                price = 28.70 * countSweets;
            } else if (sweet.equals("Souffle")) {
                price = 9.80 * countSweets;
            } else if (sweet.equals("Baklava")) {
                price = 16.98 * countSweets;
            }
        }

        if (dayOfMonth <= 22){
            if (price >= 100 && price <= 200){
                price = price * 0.85;
            } else if (price > 200){
                price = price * 0.75;
            }
        }

        System.out.printf("%.2f",price);

    }
}