code: def get_unstresses(stresses: List[int], count: int) -> List[int]:
      
      return list(set(range(count)) - set(stresses))
docs: Given a list of stressed positions, and count of possible positions, return a list of
      the unstressed positions.
  
      :param stresses: a list of stressed positions
      :param count: the number of possible positions
      :return: a list of unstressed positions
  
      >>> get_unstresses([0, 3, 6, 9, 12, 15], 17)
      [1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16]