>>> import castell  

>>> lhabs = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
>>> lportes = [(0, 12), (0, 4), (0, 13), (1, 3), (1, 13), (3, 13), (4, 13), (7, 14)]
>>> c = castell.habitacions(lhabs, lportes)
>>> castell.hab_veina(c, 0)  
[4, 12, 13]
>>> castell.hab_veina(c, 1)  
[3, 13]
>>> castell.hab_veina(c, 2)  
[]
>>> castell.hab_veina(c, 3)  
[1, 13]
>>> castell.hab_veina(c, 4)  
[0, 13]
>>> castell.hab_veina(c, 5)  
[]