('CID100161730', 2),TETRAHYDRODEOXYURIDINE
('CID100161730', 2),3,4,5,6-Tetrahydrodeoxyuridine
('CID115954983', 1),5-Methoxymethyl-2'-deoxycytidine & tetrahydrodeoxyuridine
ldiff: defaultdict(<type 'list'>, {'CID115954983': [35], 'CID100161730': [0, 8]})
f1: [0, 8]
f2: [35]
c1: Counter({0: 1, 8: 1})
c2: Counter({35: 1})
The chosen was ... CID100161730