09.fuel_tank_pt2

fuel_type = input().lower()
fuel_amount = float(input())
discount_card = input().lower()

fuel_price = 0

if fuel_type == 'gas':
    fuel_price = fuel_amount * 0.93
elif fuel_type == 'gasoline':
    fuel_price = fuel_amount * 2.22
elif fuel_type == 'diesel':
    fuel_price = fuel_amount * 2.33
else:
    print('Invalid fuel!')

if discount_card == 'yes':
    if fuel_type == 'gas':
        fuel_price -= 0.08 * fuel_amount
    elif fuel_type == 'gasoline':
        fuel_price -= 0.18 * fuel_amount
    elif fuel_type == 'diesel':
        fuel_price -= 0.12 * fuel_amount

if 20 <= fuel_amount <= 25:
    fuel_price *= 0.92
elif fuel_amount > 25:
    fuel_price *= 0.90


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