bbbb bbdd bbdo bbrc bcbc bccc bcor bd-r bdbc bddc bnoc bnor bnrr bobb bobo bock boco bodb bodo bokn boko bonc bond bonk bonn bono boob booc bood book boon boor bor- bord bork born boro borr brcb brdo brkb brno brob broc brod brok bron broo bror brrr c-bo c-cd cbbc cbcc cbcn cbcr cbdb cbdc cbdn cbdo cbkn cbko cbkr cbnd cbrd cbrn ccbc ccbn cccb cccc ccdc ccdn ccdr ccnb ccnc ccnr ccob ccoc ccod ccrc cd-r cddb cddr cdnb cdnc cdon ckbc ckck ckco ckdo cknb cknc ckob ckoc ckoo ckor ckrc ckrd cnbc cnco cndd cnrc cnrr cobb cobo cock coco codd cok- coko con- conc cond conk conn cono coob cood cook coon cor- corb corc cord cork corn coro corr crbc crcc crcr crdc crkc crob croc crod crok cron croo cror d-bo dbcc dbrn dcbc dccb dccc dcdb dcon dcrk dddd ddoc ddrc dkdc dnoc dnrc dobb dock doco dod- dodd dodo doko donc dond donk donn dono donr doob dood dook doon door dorc dord dork dorn doro dorr drbc drno drob drod dron kbbb kbbc kbbd kbbk kbbo kbbr kbcb kbck kbco kbcr kbdb kbdn kbdo kbdr kbkb kbkk kbko kbkr kbnd kbnn kbno kbnr kbob kboc kbod kbok kbon kboo kbrb kbrc kbrd kbrk kbrn kbro kcbc kcbd kcbk kcbr kccb kccc kccd kcck kccr kcdc kcdd kcdr kckc kckk kckn kcko kckr kcnb kcnd kcno kcnr kcob kcon kcor kcrc kcrn kcro kcrr kdbb kdbn kdbr kdcc kdcd kdco kdcr kddb kddc kddd kddk kddr kdkb kdkd kdkk kdkn kdko kdkr kdnd kdnk kdnn kdno kdnr kdoc kdok kdrb kdro kkbb kkbd kkbn kkbo kkbr kkcb kkcd kkck kkcn kkco kkcr kkdc kkdd kkdo kkkk kknb kknd kknn kkno kkob kkon kkoo kkor kkrb kkrc kkrk kkrn kkro kkrr knbb knbc knbn knbr kncb knck kncn knco kncr kndb kndc kndd kndk kndn kndo kndr knkk knnb knnd knnk knnr knob knoc knod knok knon knor knrb knrk knro kobb kobc kobk kobn kobo kobr kocb kocd kock kocn kodk kodo kokb kokc kokk kokn koko kokr konc kond konk kono koob kooc kook koon kooo koor korb korc kord kork korn koro korr krbb krbd krbk krbr krcb krcc krcd krcn krco krdc krdd krdo krdr krkc krkd krkk krkn krko krkr krnb krnd krnk krnn krno krob kroc krod krok kroo kror krrb krrc krrk krrn krro krrr nbbc nbbo nbcc nbco ncbc nccc nccn nccr ncdc ncdn ncdr ncnc ncnd ncoc ncor ncrc ndcc nddb nddo ndoc ndor ndrc nkok nkor nndb nnnn nobc nobo nock noco nodo noko non- nonn nono noo- noob nook noon nooo noor nor- norb norc nord nork norn noro norr nrdc nroc nron nrrc nrrd obbo obkb obok obon obor obro ocbc occc occn ocon ocro ocrr odbo oddd odnb odon odoo odor okko okno okok okon okor okro onc- oncd onco ondo onno onod onon onor oocr oooo oord orbb orbo orco ordn ordo orko ornc orno oro- orok oron oror orro rbbb rbbr rcbc rcbo rccb rccc rcdc rcnr rcon rcrd rdoc rnbr rnco rndc rnod rob- robb robo rocc rock roco rodd rodo rokk roko rokr ronc rond ronk rono roob rood rook roon roor rorc rork roro rrrr