lst=list(map(int,input().split()))
lst_1=""
for i in lst:
    if i % 15==0:
        lst_1 +="FizzBuzz"
    elif i % 3 ==0 and i % 5 !=0:
        lst_1 +="Fizz"
    elif i % 5 ==0 and i % 3 !=0:
        lst_1 +="Buzz"
    else:
        lst_1 +=str(i)
print(len(lst_1))