>>> from perfums import espotcomprar2, hi_ha_perfum2

>>> l=[['Rochis1',73],['Challenge',82], ['Rochis2',42],['Gege',43]]
>>> hi_ha_perfum2(l, 50)
['Gege', 'Rochis2']
>>> hi_ha_perfum2(l, 80)
['Gege', 'Rochis1', 'Rochis2']
>>> hi_ha_perfum2(l, 40)
[]

>>> d = {100:[['Rochis1',78],['Challenge',82]],
... 50:[['Rochis2',42]],200:[['Gege',43]]}
>>> espotcomprar2(d,50)
['Gege', 'Rochis2']
>>> espotcomprar2(d,25)
[]