a = list(map(int, input().split()))
b = list()

for i in range(len(a)):
    b.append("")
    if a[i] % 3 == 0:
        b[-1] = "Fizz"
    if a[i] % 5 == 0:
        b[-1] += "Buzz"
    if len(b[-1]) == 0:
        b[-1] = str(a[i])

ans = len("".join(b))
print(ans)