('CID100004686', 7),Acetate de paramethasone
('CID100004686', 7),paramethasone
('CID100004686', 7),PARAMETHASONE ACETATE
('CID100004686', 7),Paramethasone acetate (JAN/USP)
('CID100004686', 7),Paramethasone 21-acetate
('CID100004686', 7),Paramethasone acetate [USAN:JAN]
('CID100004686', 7),PARAMETHASONE ACETATE
('CID100005875', 5),paramethasone
('CID100005875', 5),Paramethasone
('CID100005875', 5),Paramethasone (INN)
('CID100005875', 5),Paramethasone [INN:BAN]
('CID100005875', 5),paramethasone
ldiff: defaultdict(<type 'list'>, {'CID100004686': [11, 0, 8, 18, 11, 19, 8], 'CID100005875': [0, 0, 6, 10, 0]})
f1: [11, 0, 8, 18, 11, 19, 8]
f2: [0, 0, 6, 10, 0]
c1: Counter({8: 2, 11: 2, 0: 1, 18: 1, 19: 1})
c2: Counter({0: 3, 10: 1, 6: 1})
The chosen was  ... CID100005875