('CID106327012', 4),Kaolin mixture with pectin
('CID106327012', 4),Kaolin pectin
('CID106327012', 4),Pectin-kaolin combination
('CID106327012', 4),Pectin, mixt. with kaolin
('CID100147340', 2),Silver kaolin
('CID100147340', 2),Silver Kaolin
ldiff: defaultdict(<type 'list'>, {'CID106327012': [20, 7, 19, 19], 'CID100147340': [7, 7]})
f1: [20, 7, 19, 19]
f2: [7, 7]
c1: Counter({19: 2, 20: 1, 7: 1})
c2: Counter({7: 2})
The chosen was  ... CID100147340