input: 
  def get_word_lists(strings):
      """Generates a list of lists of words from the input list of strings. Each inner list starts with the first word of the respective string followed by the subsequent words.
      >>> get_word_lists(["Hello world", "This is a test"])
      [['Hello', 'world'], ['This', 'is', 'a', 'test']]
      """
      word_lists = []
      for string in strings:
          words = string.split(" ")
          word_lists.append([words[i:] for i in range(len(words))])
      return word_lists
  
output:     word_lists = []
      for string in strings:
          words = string.split(" ")
          word_lists.append([words[i:] for i in range(len(words))])
      return word_lists