#2022/5/18 15:32
import math
a,b=map(str,input().split())
if 0<float(a)<=1 and str(b)=='y':
    print(25) 
elif 0<float(a)<=1 and str(b)=='n':
    print(20)
elif float(a)>1 and str(b)=='y':
    print(25+(math.ceil((float(a)-1)*1)))
elif float(a)>1 and str(b)=='n':
    print(20+(math.ceil((float(a)-1)*1)))