>>> from  primers import primers, sense_uns

--ini-enunciat

>>> seq = iter([1,2,3,1,1,11,12,12,1,1,1,45,67,1,1,1,1,44,45,67,89,2,1,1,1,1,1])
>>> it = sense_uns(seq)
>>> for i in range(12):
...      print(next(it), end='-')
2-3-11-12-12-45-67-44-45-67-89-2-

>>> it = sense_uns(primers())
>>> for i in range(20):
...      print(next(it), end='-')
7-5-3-11-3-23-3-47-3-5-3-101-3-7-11-3-13-233-3-467-


--fi-enunciat

>>> for i in range(30):
...      print(next(it), end='-')
3-5-3-941-3-7-1889-3-3779-3-7559-3-13-15131-3-53-3-7-30323-3-60647-3-5-3-101-3-121403-3-242807-3-

>>> for i in range(30):
...      print(next(it), end='-')
5-3-19-7-5-3-47-3-37-5-3-17-3-199-53-3-29-3-486041-3-7-421-23-3-972533-3-577-7-1945649-3-