('CID100520915', 3),Acetyldihydrocodeine
('CID100520915', 3),O-Acetyldihydrocodeine hydrochloride
('CID100520915', 3),O-Acetyldihydrocodeine hydrochloride
('CID108884206', 2),Acetyldihydrocodeine
('CID108884206', 2),Acetyldihydrocodeine
ldiff: defaultdict(<type 'list'>, {'CID108884206': [0, 0], 'CID100520915': [0, 16, 16]})
f1: [0, 16, 16]
f2: [0, 0]
c1: Counter({16: 2, 0: 1})
c2: Counter({0: 2})
The chosen was  ... CID108884206