('CID100440102', 3),alpha-D-xylopyranose 1-(dihydrogen phosphate)
('CID100440102', 3),alpha-D-xylopyranose 1-phosphate
('CID100440102', 3),alpha-D-xylopyranose 1-phosphate
('CID100000229', 2),Alpha-d-xylopyranose
('CID100000229', 2),Alpha-d-xylopyranose
ldiff: defaultdict(<type 'list'>, {'CID100000229': [0, 0], 'CID100440102': [25, 12, 12]})
f1: [25, 12, 12]
f2: [0, 0]
c1: Counter({12: 2, 25: 1})
c2: Counter({0: 2})
The chosen was  ... CID100000229