bbbb bbrc bcbc bccc bcor bctc bnoc bnor bnrr bobb bobo bock boco bokn boko bonc bonk bonn bono bont boob booc book boon boor boot bor- bork born boro borr bort botb botn boto bott brcb brkb brno brob broc brok bron broo bror brot brrr brtc btcc btob btor btrc btrt bttb c-bo cbbc cbcc cbcn cbcr cbct cbkn cbko cbkr cbot cbrn cbrt cbtc ccbc ccbn cccb cccc ccnb ccnc ccnr ccob ccoc ccrc ccrt cctb cctc cctt ckbc ckck ckco cknb cknc cknt ckob ckoc ckoo ckor ckot ckrc cktb cnbc cnco cnrc cnrr cnrt cntc cntk cntr cobb cobo cock coco coct cok- coko con- conc conk conn cono cont coob cook coon coot cor- corb corc cork corn coro corr cort cotb cotc cotn coto cott crbc crcc crcr crkc crob croc crok cron croo cror crot crrt crtc ctor ctot ctrc ctrn cttn kbbb kbbc kbbk kbbo kbbr kbbt kbcb kbck kbco kbcr kbct kbkb kbkk kbko kbkr kbnn kbno kbnr kbob kboc kbok kbon kboo kbot kbrb kbrc kbrk kbrn kbro kbrt kbtb kbtc kbtk kbtn kbto kbtr kbtt kcbc kcbk kcbr kccb kccc kcck kccr kcct kckc kckk kckn kcko kckr kcnb kcno kcnr kcnt kcob kcon kcor kcot kcrc kcrn kcro kcrr kcrt kctb kctc kctn kcto kkbb kkbn kkbo kkbr kkbt kkcb kkck kkcn kkco kkcr kkct kkkk kknb kknn kkno kknt kkob kkon kkoo kkor kkot kkrb kkrc kkrk kkrn kkro kkrr kkrt kktc kktk knbb knbc knbn knbr knbt kncb knck kncn knco kncr knct knkk knkt knnb knnk knnr knob knoc knok knon knor knot knrb knrk knro kntk kntn knto kntr kobb kobc kobk kobn kobo kobr kocb kock kocn koct kokb kokc kokk kokn koko kokr konc konk kono kont koob kooc kook koon kooo koor koot korb korc kork korn koro korr kort kotb kotc kotk kotn koto kotr kott krbb krbk krbr krbt krcb krcc krcn krco krkc krkk krkn krko krkr krnb krnk krnn krno krnt krob kroc krok kroo kror krrb krrc krrk krrn krro krrr krrt krtc krtk krtn krto krtr ktbb ktbc ktbn ktbr ktbt ktcc ktck ktco ktcr ktkb ktkc ktkk ktkn ktko ktkr ktkt ktnc ktnk ktnn ktno ktnt ktob ktoc ktok kton ktoo ktor ktot ktrb ktrc ktrk ktrn ktro ktrr ktrt kttc kttk kttn ktto kttr kttt nbbc nbbo nbcc nbco ncbc nccc nccn nccr ncct ncnc ncoc ncor ncrc nctc nctr nknt nkok nkor nktr nnnn nnot nntn nobc nobo nock noco noct noko non- nonn nono nont noo- noob nook noon nooo noor noot nor- norb norc nork norn noro norr nort not- noto nott nroc nron nrrc ntbc ntcc ntrc ntto nttr obbo obkb obok obon obor obot obro ocbc occc occn occt ocon ocro ocrr oct- octo okko okno okok okon okor okot okro okto onc- onco onct onno onon onor ont- ontc onto oocr oont oooo oort ootb orbb orbo orco orko ornc orno oro- orok oron oror orot orro ortc orto oto- otok oton otoo otor otro otto rbbb rbbr rcbc rcbo rccb rccc rcnr rcon rctc rnbr rnco rnnt rnot rob- robb robo robt rocc rock roco rokk roko rokr ronc ronk rono ront roob rook roon roor root rorc rork roro rort rotc rotk rotn roto rotr rott rrrr rtcc rtkn tbcb tbcc tbrb tccc tcnn tcon tctc tkon tnbc tncc tobo tobt tock toco toko tonb tonk tonn tono took toon toor toot torc tork torn toro torr tort totc toto totr tott trcc trno troc tron troo trot trtc trtr ttbb ttcn tton tttt