>>> from parkings import Parking
>>> from datetime import datetime
>>> p = Parking(10)
>>> p.aparca(0, '1234-ABC', datetime(2025, 5, 11, hour=10, minute=0))
>>> p.aparca(4, '2126-RRR', datetime(2025, 5, 11, hour=12, minute=0))
>>> p.aparca(3, '8364-VTL', datetime(2025, 5, 11, hour=13, minute=0))
>>> p.aparca(9, '2222-MKF', datetime(2025, 5, 13, hour=12, minute=0))
>>> p.aparca(8, 'B-5632-NB', datetime(2025, 5, 17, hour=13, minute=0))

>>> for matricula in p:
...   print(matricula)
1234-ABC
8364-VTL
2126-RRR
B-5632-NB
2222-MKF

--fi-enunciat

>>> next(iter(p))  # comprovació que iter() retorna un iterador
'1234-ABC'

>>> q = Parking(15)
>>> q.aparca(2, '2222-BBB', datetime(2025, 5, 11, hour= 9))
>>> q.aparca(4, '3333-CCC', datetime(2025, 5, 11, hour=10))
>>> q.aparca(12, '4444-DDD', datetime(2025, 5, 12, hour=11))
>>> q.aparca(7, '1111-AAA', datetime(2025, 5, 12, hour=12))
>>> q.aparca(5, '5555-EEE', datetime(2025, 5, 12, hour=16))
>>> q.aparca(0, '6666-FFF', datetime(2025, 5, 12, hour=16))
>>> for matricula in q:
...   print(matricula)
6666-FFF
2222-BBB
3333-CCC
5555-EEE
1111-AAA
4444-DDD