A = list(map(int, input().split()))
text = str()

for i in range(len(A)):
    if A[i] % 5 == 0 and A[i] % 3 == 0:
        text += 'FizzBuzz'
    elif A[i] % 5 == 0:
        text += 'Buzz'
    elif A[i] % 3 == 0:
        text += 'Fizz'
    else:
        text += str(A[i])

print(len(text))