input: Write a function to generate a string where each phrase from a given list of phrases is followed by its length in parentheses. If the given list is empty, return an empty string.
  assert generate_phrase_length_string(["A bird in the hand", "is worth two in the bush"]) == "A bird in the hand (17)is worth two in the bush (25)"
  assert generate_phrase_length_string([]) == ""
output: def generate_phrase_length_string(phrases):
      if not phrases:
          return ""
      result = ""
      for phrase in phrases:
          result += f"{phrase} ({len(phrase)})"
      return result