type_fuel = input()
litres_fuel = float(input())
club_card = input()
price = 0

if club_card == 'Yes':
    if type_fuel == 'Gas':
        price = (0.93 - 0.08) * litres_fuel
    elif type_fuel == 'Gasoline':
        price = (2.22 - 0.18) * litres_fuel
    else:
        price = (2.33 - 0.12) * litres_fuel
else:
    if type_fuel == 'Gas':
        price = 0.93 * litres_fuel
    elif type_fuel == 'Gasoline':
        price = 2.22 * litres_fuel
    else:
        price = 2.33 * litres_fuel

if litres_fuel > 25:
    price -= (price * 0.10)
elif litres_fuel >= 20:
    price -= (price * 0.08)

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