('CID100026035', 2),Aceprometazine
('CID100026035', 2),Aceprometazine [INN:DCF]
('CID100192141', 1),Acepromazine mixture with aceprometazine and chlorazepate
ldiff: defaultdict(<type 'list'>, {'CID100026035': [0, 10], 'CID100192141': [43]})
f1: [0, 10]
f2: [43]
c1: Counter({0: 1, 10: 1})
c2: Counter({43: 1})
The chosen was ... CID100026035