('CID100004987', 6),purvalanol A
('CID100004987', 6),Purvalanol A
('CID100004987', 6),purvalanol A
('CID100004987', 6),Purvalanol-?A
('CID100004987', 6),PURVALANOL A
('CID100004987', 6),purvalanol A
('CID100448991', 4),PURVALANOL
('CID100448991', 4),Purvalanol B
('CID100448991', 4),PURVALANOL
('CID100448991', 4),Purvalanol B
ldiff: defaultdict(<type 'list'>, {'CID100448991': [0, 2, 0, 2], 'CID100004987': [2, 2, 2, 3, 2, 2]})
f1: [2, 2, 2, 3, 2, 2]
f2: [0, 2, 0, 2]
c1: Counter({2: 5, 3: 1})
c2: Counter({0: 2, 2: 2})
The chosen was  ... CID100448991