A = [int(x) for x in input().split()]
ans = ""

for a in A:
    if a % 3 == 0 and a % 5 == 0:
        ans += "FizzBuzz"
    elif a % 3 == 0 and a % 5 != 0:
        ans += "Fizz"
    elif a % 3 != 0 and a % 5 == 0:
        ans += "Buzz"
    else:
        ans += str(a)

print(len(ans))