import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

A = list(map(int, read().split()))

def f(n):
    bl3 = n%3 == 0
    bl5 = n%5 == 0
    if bl3 and bl5:
        return 'FizzBuzz'
    if bl3:
        return 'Fizz'
    if bl5:
        return 'Buzz'
    return str(n)

word = ''.join(map(f,A))

answer = len(word)
print(answer)