N = list(map(int, input().split()))

risuto = []
for n in N:
    if n % 3 == 0 and n % 5 == 0:
        risuto.append('FizzBuzz')
    elif n % 3 == 0:
        risuto.append('Fizz')
    elif n % 5 == 0:
        risuto.append('Buzz')
    else:
        risuto.append(str(n))

ans = 0
for i in risuto:
    ans += len(i)
print(ans)