>>> from trip_planner import plan_trip

--ini

>>> sol = plan_trip(1, 5.5, False, True, 2000.0)
>>> sol
('metro', 2005.5)

>>> sol = plan_trip(3, 0.5, False, True, 2000.0)
>>> sol
('taxi', 2001.5)

>>> sol = plan_trip(2, 5.0, False, False, 2000.0)
>>> sol
('moto', 2010.0)

--fi

>>> sol = plan_trip(2, 40.0, False, False, 2000.0)
>>> sol
('moto', 2080.0)

>>> sol = plan_trip(1, 99.0, False, False, 2000.0)
>>> sol
('moto', 2099.0)

>>> sol = plan_trip(1, 101.0, False, False, 2000.0)
>>> sol
('moto', 2101.0)

>>> sol = plan_trip(2, 101.0, True, True, 2000.0)
>>> sol
('cotxe', 2202.0)

>>> sol = plan_trip(2, -10.0, True, False, 2000.0)
>>> sol
('error', 2000.0)

>>> sol = plan_trip(2, 0.0, True, False, 2000.0)
>>> sol
('error', 2000.0)

>>> sol = plan_trip(-2, 75.0, True, False, 2000.0)
>>> sol
('error', 2000.0)

>>> sol = plan_trip(5, 45.0, True, False, 2000.0)
>>> sol
('error', 2000.0)