bbbb bbdd bbdo bbpr bbrc bcbc bcbp bccc bcnu bcor bcpp bcru bcuc bcup bd-r bdbc bddc bdpc bnoc bnor bnpp bnrr bobb bobo bobu boco bocu bodb bodo bodu bonc bond bonn bono bonu boob booc bood boon boop boor bopp bor- bord born boro borr boru boud boun boup bour bpcp bprc bprd brcb brdo brno brob broc brod bron broo bror brou brrr bruc brud brun brup bubb bubo bubu bucc buco bucu budb budd budo budu bunb bund bunn buno bunu buon bupc bur- burb burd burn buro burp burr buru c-bo c-cd cbbc cbcc cbcn cbcp cbcr cbcu cbdb cbdc cbdn cbdo cbnd cbpc cbpp cbrd cbrn ccbc ccbn cccb cccc cccp cccu ccdc ccdn ccdp ccdr ccnb ccnc ccnp ccnr ccnu ccob ccoc ccod ccpn ccpp ccpr ccrc ccrp ccuc ccup cd-r cddb cddr cdnb cdnc cdon cnbc cnbp cnco cncp cndd cndp cnrc cnrr cobb cobo cobu coco cocp cocu codd con- conc cond conn cono coob cood coon coop copd copo copp copr cor- corb corc cord corn coro corp corr coub coud coun coup cour cpbc cpcu cpnb cppd crbc crbu crcc crcr crdc crob croc crod cron croo crop cror crpc crub crud crun crup cub- cubb cucc cucn cund cuno cunp cuon cupo cupp cupr curb curd curn curo curr d-bo dbcc dbcp dbpc dbpd dbrn dcbc dccb dccc dccp dccu dcdb dcon dcop dcpo dcup dddd ddoc ddpo ddrc ddub dnoc dnpo dnrc dobb dobu doco docu dod- dodd dodo donc dond donn dono donp donr doob dood doon doop door dopo dopp dopr dorc dord dorn doro dorp dorr doru doub douc doud doun doup dour dpbc dpcp dppc drbc drno drob drod dron drop drou drub drup druu dub- dubb dubc dubu duco dudd dudo dudu dunc dunn duno duo- duon dupo durn duro duru duur n-up nbbc nbbo nbcc nbco nbpp ncbc nccc nccn nccp nccr nccu ncdc ncdn ncdr ncdu ncnc ncnd ncoc ncor ncpc ncrc ncrp ndcc ndcp nddb nddo ndnp ndoc ndop ndor ndpd ndpr ndrc nndb nnnn nnpr nobc nobo nobu noco nodo nodu non- nonn nono nonu noo- noob noon nooo noop noor nor- norb norc nord norn noro norr noun noup nour npcc nppc nppd nrdc nroc nron nrpc nrpn nrrc nrrd nubc nucu nudc nudd nudo nunc nunn nuno nuoc nuon nurc nurd nurn nurp nurr nuru obbo obon obor obro ocbc occc occn ocon ocpd ocpp ocro ocrr ocur odbo oddd odnb odon odoo odop odor odou odrp odur onc- oncd onco ondo onno onod onon onor onpu onup onur oocr oooo oord opo- opon opor oppo orbb orbo orbu orco ordn ordo ordu ornc orno oro- oron oror orpc orro orub orup oucc oudc oun- ound our- ourn ouro ouu- pbcc pboc pcbc pccc pcod pcpb pcpn pcpp pcrc pcrd pcun pdcp pdoc pdpn pdpr pdrc pnon pnpo pnpp pnro pnup pobo pocd poco pod- podd podo podu ponc pond pono ponp pood poon poop poor pop- popc popo popp porb porc porn poro porr poud poun poup pour ppcc ppcd ppod pppd pppn pppo pppp pprc ppru ppur prbc prcc prcd prcp prnd prnp pro- prob proc prod pron proo prop prou prpd prrd prud pruu pubu pudo pudu punc pund puno punu pupu pur- purb puro purp purr puru puuc rbbb rbbr rcbc rcbo rccb rccc rcdc rcnr rcon rcpd rcpo rcrd rdbp rdoc rdpc rnbr rnco rncp rndc rndp rnod rob- robb robo robu rocc roco rodd rodo ronc rond rono roob rood roon roop roor ropo rorc roro roru roub roud roun roup rpdp rpob rpon rppn rrrr rrun rubb rubp rubu rudd rudo rudp runc rund runn runo rupp rurc rurd ruro rurp ruru ruud ruun u-rp ubbo uboc ubod ubon ubpc ubud ucbc uccp ucdc ucdd ucon ucpb ucrc udbc udon udoo udop udpd udun unbd uncc unco uncp undo unno unon unop unpc unro uocc uor- updo upnp upon upor uppc uppp uppu upup urdu uro- uroo urpo urun urup urur uucp uuno uuoc uuuu