03. Excursion Calculator

people = int(input())
season = input()

if season == "spring":
    if people <= 5:
        price = people * 50
    else:
        price = people * 48
elif season == "summer":
    if people <= 5:
        price = people * 48.5 * 0.85
    else:
        price = people * 45 * 0.85
elif season == "autumn":
    if people <= 5:
        price = people * 60
    else:
        price = people * 49.5
else:
    if people <= 5:
        price = people * 86 * 1.08
    else:
        price = people * 85 * 1.08

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