('CID100006180', 6),N-Acetylmethionine ('CID100006180', 6),N-Acetylmethionine ('CID100006180', 6),N-acetylmethionine ('CID100006180', 6),N-Acetylmethionine ('CID100006180', 6),N-Acetylmethionine ('CID100006180', 6),N-Acetylmethionine ('CID100193368', 5),N-acetylmethionine Sulfoxide ('CID100193368', 5), N-Acetylmethionine sulfoxide ('CID100193368', 5),N-Acetylmethionine sulfoxide ('CID100193368', 5),N-Acetylmethionine sulfoxide ('CID100193368', 5),N-Acetylmethionine sulfoxide ldiff: defaultdict(, {'CID100006180': [0, 0, 0, 0, 0, 0], 'CID100193368': [10, 11, 10, 10, 10]}) f1: [0, 0, 0, 0, 0, 0] f2: [10, 11, 10, 10, 10] c1: Counter({0: 6}) c2: Counter({10: 4, 11: 1}) The chosen was ... CID100006180