bbbb bbci bcbc bccc bcci bcit bctc bibb bibi bibo bicc bici bick bico biko bio- bioc bioi biot bitc bito bitt bobb bobi bobo bock boco boi- boii boit boki boko boob booc book boot botb boti boto bott btcc btob bttb c-bo cbbc cbcc cbct cbit cbko cbot cbtc ccbc cccb cccc ccci ccic ccii ccob ccoc cctb cctc cctt cibc cibi cibo cicc cici cico cict ciii ciit ciko ciob citb citi cito citt ckbc ckbi ckck ckco ckob ckoc ckoi ckoo ckot cktb cobb cobi cobo cock coco coct coit cok- coko coob cook coot cotb cotc coti coto cott ctbi ctic ctot ibot ibtb ibtc icbc iccb iccc icci icco icct icoc iiii iiio iiit iioi iioo iitt ikki ikko ikoo iobi ioci ioii ioio ioit ioko iooi iooo ioto itic itko itoi itoo itto k-ci kbbb kbbc kbbi kbbk kbbo kbbt kbcb kbci kbck kbco kbct kbib kbic kbik kbio kbit kbkb kbkk kbko kbob kboc kboi kbok kboo kbot kbtb kbtc kbtk kbto kbtt kcbc kcbi kcbk kccb kccc kcci kcck kcct kcic kcii kcit kckc kckk kcko kcob kcot kctb kctc kcti kcto kibb kibc kibi kibo kibt kicb kicc kick kict kiic kiii kiik kiit kikc kiki kikk kiko kikt kioc kioi kiok kioo kiot kitc kiti kito kitt kkbb kkbi kkbo kkbt kkcb kkci kkck kkco kkct kkic kkik kkit kkkk kkob kkoo kkot kktc kktk kobb kobc kobi kobk kobo kocb koci kock koct koii koit kokb kokc koki kokk koko koob kooc kooi kook kooo koot kotb kotc koti kotk koto kott ktbb ktbc ktbt ktcc ktck ktco ktib ktic ktik ktkb ktkc ktkk ktko ktkt ktob ktoc ktok ktoo ktot kttc ktti kttk ktto kttt obbo obit obkb oboi obok obot ocbc occc occi occt oct- octi octo oici oick oiii oiko oitc oiti okic okko okok okot okto oobi oooo ootb otic otit oto- otok otoo otti otto tbcb tbcc tbit tccc tctc tibi ticc tick tico tiit tiki tiko titc titi tito titt tobi tobo tobt toci tock toco toit toki toko took toot totc toti toto tott ttbb tttt