('CID100007697', 9),2-Chlorphenesin
('CID100007697', 9),P-chlorophenyl-alpha-glyceryl ether (same as chlorphenesin)
('CID100007697', 9),chlorphenesin
('CID100007697', 9),Chlorphenesin
('CID100007697', 9),Chlorphenesine
('CID100007697', 9),Chlorphenesine [INN-French]
('CID100007697', 9),Chlorphenesin [INN:BAN]
('CID100007697', 9),chlorphenesin
('CID100007697', 9),Chlorphenesine
('CID100002724', 7),chlorphenesin
('CID100002724', 7), Chlorphenesin carbamate
('CID100002724', 7),Chlorphenesin Carbamate
('CID100002724', 7),CHLORPHENESIN CARBAMATE
('CID100002724', 7),Chlorphenesin carbamate (JP15/USAN)
('CID100002724', 7),Chlorphenesin carbamate (JP16/USAN)
('CID100002724', 7),Chlorphenesin carbamate [USAN:JAN]
ldiff: defaultdict(<type 'list'>, {'CID100007697': [2, 46, 0, 0, 1, 14, 10, 0, 1], 'CID100002724': [0, 11, 10, 10, 22, 22, 21]})
f1: [2, 46, 0, 0, 1, 14, 10, 0, 1]
f2: [0, 11, 10, 10, 22, 22, 21]
c1: Counter({0: 3, 1: 2, 2: 1, 10: 1, 14: 1, 46: 1})
c2: Counter({10: 2, 22: 2, 0: 1, 11: 1, 21: 1})
The chosen was ... CID100007697