input: Write a function to generate a list of lists of words from a list of strings. The returned list should have the first word for each string followed by following words for each string.
  
  def get_word_lists(strings):
      word_lists = []
      for string in strings:
          words = string.split(" ")
          word_list = []
          for i in range(len(words)):
              word_list.append(words[i:])
          word_lists.append(word_list)
      return word_lists
  
  assert get_word_lists(["Hello world", "This is a test"])==[["Hello", "world"], ["This", "is", "a", "test"]]
  assert get_word_lists(["Python is fun", "Coding is awesome"])==[["Python", "is", "fun"], ["Coding", "is", "awesome"]]
  assert get_word_lists(["Challenge accepted", "Keep learning"])==[["Challenge", "accepted"], ["Keep", "learning"]]
  assert get_word_lists([])==[]
  assert get_word_lists(["SingleWord"])==[["SingleWord"]]
output: def get_word_lists(strings):
      word_lists = []
      for string in strings:
          words = string.split(" ")
          word_lists.append(words)
      return word_lists