# import sequtils, strutils

from strutils import parseInt, split
from sequtils import map
import math

var
  ai=stdin.readLine.split.map(parseInt)
  ret=""
  
for e in ai:
  if e mod 3==0 and e mod 5==0:
    ret&="FizzBuzz"
  elif e mod 3==0:
    ret&="Fizz"
  elif e mod 5==0:
    ret&="Buzz"
  else:
    ret&=($e)

echo ret.len