lilias = int(input())  # 2              #46.14
roses = int(input())  # 4
tulips = int(input())  # 8
season = str(input())  # Spring
day = str(input())  # Y

lilia_price = 0
rose_price = 0
tulip_price = 0
if season == 'Spring' or season == 'Summer':
    lilia_price = 2
    rose_price = 4.1
    tulip_price = 2.5
else:
    lilia_price = 3.75
    rose_price = 4.5
    tulip_price = 4.15

bouquet = lilias * lilia_price + rose_price * roses + tulip_price * tulips

if day == 'Y':
    bouquet *= 1.15

if season == 'Spring' and tulips >= 7:
    bouquet *= 0.95
if season == 'Winter' and roses >= 10:
    bouquet *= 0.9

if lilias + tulips + roses > 20:
    bouquet *= 0.8

bouquet += 2

print(f'{bouquet:.2f}')