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def decode(message):
"""
>>> decode('Oea ie.mtat n')
'One at a time.'
>>> decode("W'entwies u o,cnw ev.erse a ybtb,rta o re")
"We're not waiters, but boy, can we serve."
>>> decode('Dtn enspae srsy oemasntigt s.uo nho ne vL.ki iryl intagia')
'Dating a tennis player is risky. Love means nothing to us.'
"""
def encode(message):
"""
>>> encode('One at a time.')
'Oea ie.mtat n'
>>> encode("We're not waiters, but boy, can we serve.")
"W'entwies u o,cnw ev.erse a ybtb,rta o re"
>>> encode('Dating a tennis player is risky. Love means nothing to us.')
'Dtn enspae srsy oemasntigt s.uo nho ne vL.ki iryl intagia'
>>> encode('Tennis referees must always look from left to right, as is the case here. Who was the chair umpire in the monster match at Wimbledon between Isner and Mahut?')
"""
if __name__ == '__main__':
import doctest
doctest.testmod()