lst = [int(i) for i in input().strip().split(' ')]

a = 0

for i in lst:
  tmp = ''
  if i % 3 == 0:
    tmp += 'Fizz'
  if i % 5 == 0:
    tmp += 'Buzz'
  if len(tmp) == 0:
    tmp = str(i)
  
  a += len(tmp)

print(str(a))