('CID100004740', 5),Pentoxifylline [USAN:INN:JAN]
('CID100004740', 5),Pentoxifyllin
('CID100004740', 5),pentoxifylline
('CID100004740', 5),Pentoxifylline
('CID100004740', 5),Pentoxifylline (JAN/USP/INN)
('CID100131134', 3),Pentoxifylline-alpha-methoxy-alpha-(trifluoromethyl)phenylacetate ester
('CID100131134', 3),Pentoxifylline Mtpa
('CID100131134', 3),Pentoxifylline mtpa
ldiff: defaultdict(<type 'list'>, {'CID100131134': [57, 5, 5], 'CID100004740': [15, -1, 0, 0, 14]})
f1: [15, -1, 0, 0, 14]
f2: [57, 5, 5]
c1: Counter({0: 2, 14: 1, -1: 1, 15: 1})
c2: Counter({5: 2, 57: 1})
The chosen was ... CID100004740