






def    a__    (	A       ):
   return " ".join(sorted(set(sentence.split()       )       )       )


if __name__ == "__main__":
 import doctest

 doctest.testmod()










def    a__    (	A       ):
   return " ".join([word[::-1] for word in input_str.split()]       )


if __name__ == "__main__":
 import doctest

 doctest.testmod()


