>>> from aigua import episodis

--ini-enunciat

>>> it1 = iter([200, 300, 300, 850, 1056, 1040, 1067, 900, 500, 200, 1000, 1200, 950, 1000, 980, 1050, 1000])
>>> it2 = episodis(it1)
>>> next(it2)
3
>>> next(it2)
2
>>> next(it2)
1
>>> next(it2)
2
>>> next(it2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
StopIteration

--fi-enunciat
>>> it1 = iter([800, 900, 780, 900, 910])
>>> it2 = episodis(it1)
>>> next(it2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
StopIteration
>>> it1 = iter([1200, 1300, 1302, 1050, 980, 981, 984, 1002, 1067, 1045, 800])
>>> it2 = episodis(it1)
>>> list(it2)
[4, 3]
>>> it1 = iter([1200, 900, 1200, 900])
>>> it2 = episodis(it1)
>>> list(it2)
[1, 1]
>>> it1 = iter([1200, 900, 1200, 900, 1200])
>>> it2 = episodis(it1)
>>> list(it2)
[1, 1, 1]
>>> it2 = episodis(iter([]))
>>> next(it2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
StopIteration