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def swap_ends(message: str) -> str:

  """Return a new string that is message with the first and


  characters swapped.


  Precondition: len(message) >= 2


  >>> swap_ends('cat')


  >>> swap_ends('breakfast for dinner!')

  '!reakfast for dinnerb'


  last_char = message[-1]

  middle = message[1:-2]

  first_char = message[0]


  return last_char + middle + first_char

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