('CID106603928', 2),(S)-MAP4 hydrochloride
('CID106603928', 2),(S)-MAP4 hydrochloride
('CID101795542', 1),(S)-MAP4 hydrochloride
ldiff: defaultdict(<type 'list'>, {'CID101795542': [0], 'CID106603928': [0, 0]})
f1: [0, 0]
f2: [0]
c1: Counter({0: 2})
c2: Counter({0: 1})
The chosen was ... CID106603928