('CID100000911', 6),N-FORMYLMETHIONINE
('CID100000911', 6),N-Formylmethionine
('CID100000911', 6),N-FORMYLMETHIONINE
('CID100000911', 6),N-FORMYLMETHIONINE
('CID100000911', 6),N-FORMYLMETHIONINE
('CID100000911', 6),N-FORMYLMETHIONINE
('CID100004364', 4),Leucyl-Phenylalanine, N-Formylmethionine
('CID100004364', 4),N-FORMYLMETHIONINE LEUCYL-PHENYLALANINE
('CID100004364', 4),N-formylmethionine Leucyl-phenylalanine
('CID100004364', 4),N-FORMYLMETHIONINE LEUCYL-PHENYLALANINE
ldiff: defaultdict(<type 'list'>, {'CID100004364': [22, 21, 21, 21], 'CID100000911': [0, 0, 0, 0, 0, 0]})
f1: [0, 0, 0, 0, 0, 0]
f2: [22, 21, 21, 21]
c1: Counter({0: 6})
c2: Counter({21: 3, 22: 1})
The chosen was ... CID100000911