public String fizzBuzz(int n){
  String s = "";
  if (n == 0)
    return s;
  if((n % 5) == 0)
    s = "Buzz" + s;
  if((n % 3) == 0)
    s = "Fizz" + s;
  if (s.equals(""))
    s = n + "";
  return fizzBuzz(n-1) +  s;
}