('CID104475494', 2),Monoazido-Mu-Oxo-Diiron
('CID104475494', 2),MONOAZIDO-MU-OXO-DIIRON
('CID100023925', 1),Monoazido-Mu-Oxo-Diiron
ldiff: defaultdict(<type 'list'>, {'CID100023925': [0], 'CID104475494': [0, 0]})
f1: [0, 0]
f2: [0]
c1: Counter({0: 2})
c2: Counter({0: 1})
The chosen was ... CID104475494