fuel_type = input()
liters = float(input())
card = input()

price = 0

if card == "No":
    if fuel_type == "Gasoline":
        price = 2.22 * liters
    elif fuel_type == "Diesel":
        price = 2.33 * liters
    else:
        price = 0.93 * liters

else:
    if fuel_type == "Gasoline":
        price = (2.22 - 0.18) * liters
    elif fuel_type == "Diesel":
        price = (2.33 - 0.12) * liters
    else:
        price = (0.93 - 0.08) * liters

if 20 <= liters <= 25:
    price -= price * 0.08

if liters > 25:
    price -= price * 0.1


print(f"{price:.2f} lv.")