public String[] fizzBuzz(int start, int end) {
  int len = end - start;
  String[] a = new String[len];
  for (int i = 0; i < len ; i++) {
    int n = start + i;
    String str = "" + n;
    if (n % 3 == 0 && n % 5 == 0) {
      str = "FizzBuzz";
    }
    else if (n % 3 == 0) {
      str = "Fizz";
    }
    else if (n % 5 == 0) {
      str = "Buzz";
    }
    a[i] = str;
  }
  return a;
}