Comment by asattarmd

I'd remove the else if blocks since we're returning.

    private String generateGuessSentence(char candidate, int count) {
      if (count === 0) return "There are no " + candidate + "s";
      if (count === 1) return "There is 1 " + candidate;

      return "There are " + count + " " + candidate + "s";
    }