That max looks suspicious. It (ab)uses the fact that the strings "Fizz", "Buzz" compare higher than any printed integer. If you try to extend it to (7, " Bazz")

That max looks suspicious. It (ab)uses the fact that the strings "Fizz", "Buzz" compare higher than any printed integer. If you try to extend it to (7, " Bazz") it fails, because " " comes before digits.