numlist = input().split(" ")

for i in range(len(numlist)):
	a = ""
	if int(numlist[i]) % 3 == 0:
		a += "Fizz"
	if int(numlist[i]) % 5 == 0:
		a += "Buzz"
	if a != "":
		numlist[i] = a
		
lengthlist =  [len(numlist[i]) for i in range(len(numlist))]

print(sum(lengthlist))