('CID100000618', 7),D-SORBITOL-6-P
('CID100000618', 7),D-SORBITOL-6-PHOSPHATE
('CID100000618', 7),D-SORBITOL-6-P
('CID100000618', 7),D-sorbitol 6-phosphate
('CID100000618', 7),D-Sorbitol 6-phosphate
('CID100000618', 7),D-sorbitol 6-phosphate
('CID100000618', 7),D-SORBITOL-6-PHOSPHATE
('CID100000453', 5),D-Sorbitol
('CID100000453', 5),D-Sorbitol
('CID100000453', 5),D-Sorbitol (JP15)
('CID100000453', 5),D-Sorbitol (JP16)
('CID100000453', 5),D-Sorbitol-1-13C
ldiff: defaultdict(<type 'list'>, {'CID100000618': [4, 12, 4, 12, 12, 12, 12], 'CID100000453': [0, 0, 7, 7, 6]})
f1: [4, 12, 4, 12, 12, 12, 12]
f2: [0, 0, 7, 7, 6]
c1: Counter({12: 5, 4: 2})
c2: Counter({0: 2, 7: 2, 6: 1})
The chosen was  ... CID100000453