>>> from coprimers import crea_graf_coprimers
>>> from ex3 import candidats_a_primers

>>> c = set(range(2, 10))
>>> g = crea_graf_coprimers(c)
>>> candidats_a_primers(g)
[2, 3, 5, 7]

>>> c = set(range(5, 20))
>>> g = crea_graf_coprimers(c)
>>> candidats_a_primers(g)
[5, 6, 7, 11, 13, 17, 19]

----

>>> c = set(range(50, 100))
>>> g = crea_graf_coprimers(c)
>>> candidats_a_primers(g)
[50, 51, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]

>>> c = set(range(2, 100))
>>> g = crea_graf_coprimers(c)
>>> candidats_a_primers(g)
[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]