('CID100062930', 8),Norelgestromin ('CID100062930', 8), Norelgestromin ('CID100062930', 8),Norelgestromin [USAN:INN] ('CID100062930', 8),progestin norelgestromin ('CID100062930', 8),Norelgestromin ('CID100062930', 8),Norelgestromin ('CID100062930', 8),Norelgestromin (USAN/INN) ('CID100062930', 8),Norelgestromin ('CID109809303', 6),Norelgestromin ('CID109809303', 6),Ethinyl estradiol mixture with norelgestromin ('CID109809303', 6),Ethinyl Estradiol / Norelgestromin ('CID109809303', 6),Ethinylestradiol-norelgestromin mixt. ('CID109809303', 6),norelgestromin-ethinyl estradiol combination patch ('CID109809303', 6),Norelgestromin-Ethinylestradiol mixt. ldiff: defaultdict(, {'CID109809303': [0, 31, 20, 23, 36, 23], 'CID100062930': [0, 1, 11, 10, 0, 0, 11, 0]}) f1: [0, 1, 11, 10, 0, 0, 11, 0] f2: [0, 31, 20, 23, 36, 23] c1: Counter({0: 4, 11: 2, 1: 1, 10: 1}) c2: Counter({23: 2, 0: 1, 36: 1, 20: 1, 31: 1}) The chosen was ... CID100062930