#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
data = map(int, sys.stdin.readline().split(' '))

s = ''
for d in data:
    if d%3 == 0 and d%5 == 0:
        s += 'FizzBuzz'
    elif  d%5 == 0:
        s += 'Buzz'
    elif  d%3 == 0:
        s += 'Fuzz'
    else:
        s += str(d)

print(len(s))