code: def spasser(inbox, s=None):
      
      seq = (s or range(len(inbox)))
      return [input_ for i, input_ in enumerate(inbox) if i in seq]
docs: Passes inputs with indecies in s. By default passes the whole inbox.
  
      Arguments:
  
        - s(sequence) [default: ``None``] The default translates to a range for
          all inputs of the "inbox" i.e. ``range(len(inbox))``