bbbb bbbs bbdd bbdo bbrc bcbc bcbs bccc bccs bcds bcor bcos bcrs bcsc bcss bctc bcts bd-r bdbc bddc bdos bdsd bobb bobo bobs bock boco bocs bodb bodo bods boko boks boob booc bood book boor boos boot bor- bord bork boro borr bors bort bosc bosk boso boss bost botb botd boto bots bott brcb brdo brds brdt brkb brob broc brod brok broo bror bros brot brrr brrs brsb brsr brst brtc bsbd bscs bskt bsod bsos bsrd bssc bssd bsts btcc btcs btdt btob btor btrc btrt btss bttb c-bo c-cd cbbc cbbs cbcc cbcr cbcs cbct cbdb cbdc cbdo cbds cbko cbkr cbot cbrd cbrt cbsc cbtc ccbc cccb cccc cccs ccdc ccdr ccds ccob ccoc ccod ccrc ccrs ccrt ccsd ccss ccst cctb cctc cctt cd-r cdcs cddb cddr cdos cdot cdrs cdss ckbc ckck ckco ckcs ckdo ckob ckoc ckoo ckor ckos ckot ckrc ckrd cksb ckso ckst cktb ckts cobb cobo cobs cock coco coct codd cods cok- coko coob cood cook coos coot cor- corb corc cord cork coro corr cors cort cosc coso coss cost cotb cotc coto cots cott crbc crcc crcr crdc crkc crob croc crod crok croo cror crot crrt crss crst crtc crts cscb cscc cscd csco cscr cscs csdb csdr csks csob csor csos csot csrc csrd csrs cssd cssr cstc cstd csto cstr csts ctbs ctor ctos ctot ctrc ctrs ctsc ctss ctts d-bo dbcc dbcs dbos dbrs dbss dbtt dcbc dccb dccc dccs dcct dcdb dcds dcos dcrk dcsc dcss dctc dcts dddd ddoc ddot ddrc ddss ddts dkdc dobb dobs dock doco docs doct dod- dodd dodo dods doko doob dood dook door doos doot dorc dord dork doro dorr dors dort dosk doso doss dost dotd dotk doto dots dott drbc drob drod drot drrs dsbc dscc dscr dscs dsdr dsos dsrc dsrr dssc dsst dstc dsto dsts dtcc dtor dtot dtss k-os kbbb kbbc kbbd kbbk kbbo kbbr kbbs kbbt kbcb kbck kbco kbcr kbcs kbct kbdb kbdo kbdr kbds kbkb kbkk kbko kbkr kbob kboc kbod kbok kboo kbos kbot kbrb kbrc kbrd kbrk kbro kbrt kbsb kbsk kbso kbsr kbss kbst kbtb kbtc kbtk kbto kbtr kbts kbtt kcbc kcbd kcbk kcbr kcbs kccb kccc kccd kcck kccr kcct kcdc kcdd kcdr kcds kckc kckk kcko kckr kcob kcor kcos kcot kcrc kcro kcrr kcrs kcrt kcsb kcsc kcsd kcsr kcss kcst kctb kctc kcto kdbb kdbr kdbs kdcc kdcd kdco kdcr kddb kddc kddd kddk kddr kdkb kdkd kdkk kdko kdkr kdkt kdoc kdok kdot kdrb kdro kdrs kdsc kdsd kdsk kdsr kdss kdst kdtd kdtr kkbb kkbd kkbo kkbr kkbs kkbt kkcb kkcd kkck kkco kkcr kkcs kkct kkdc kkdd kkdo kkdt kkkk kkob kkoo kkor kkot kkrb kkrc kkrk kkro kkrr kkrs kkrt kksd kksr kkss kkst kktc kktk kkts kobb kobc kobk kobo kobr kobs kocb kocd kock kocs koct kodk kodo kods kodt kokb kokc kokk koko kokr koks koob kooc kook kooo koor koos koot korb korc kord kork koro korr kors kort kos- kosb kosc kosd koso kosr koss kost kotb kotc kotd kotk koto kotr kots kott krbb krbd krbk krbr krbt krcb krcc krcd krco krcs krdc krdd krdo krdr krds krkc krkd krkk krko krkr krks krob kroc krod krok kroo kror kros krrb krrc krrk krro krrr krrs krrt krsc krsd krsk krsr krss krst krtc krtk krto krtr krts ksbc ksbr ksbs kscb ksck ksco kscr kscs ksdc ksdk ksdr ksds kskb kskd kskk ksko kskr ksks ksob ksoc ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksrt ksso kssr ksss ksst kstb kstc kstk ksto kstr ksts kstt ktbb ktbc ktbr ktbt ktcc ktck ktco ktcr ktcs ktdb ktdc ktdd ktdk ktdo ktdr ktkb ktkc ktkk ktko ktkr ktks ktkt ktob ktoc ktok ktoo ktor ktot ktrb ktrc ktrk ktro ktrr ktrs ktrt ktsc ktsd ktso ktsr ktst kttc kttk ktto kttr ktts kttt obbo obdt obkb obok obor obos obot obro obsd obsr obss obst obtd obts ocbc occc occt ocds ocks ocos ocro ocrr ocrs oct- octo octs odbo oddd odds odoo odor odos odot odso odts okko okok okor okot okro okso okto oocr oooo ooos oord oort oost ootb oots orbb orbo orbs orco orcs ordo ords orko oro- orok oror oros orot orro orrs orsk orso ortc orto orts oscc osco osoo osor osos osrd osro ossb ossd osso ostc ostr osts otbd otbs otcd oto- otok otoo otor otos otro otrs otso otto otts rbbb rbbr rbbs rbds rbsd rbss rbst rcbc rcbo rccb rccc rccs rcdc rcds rcos rcrd rcsc rcsd rcss rctc rcts rdoc rdos rdso rkos rkss rkts rob- robb robo robs robt rocc rock roco rocs rodd rodo rods rokk roko rokr roks roob rood rook roor roos root rorc rork roro rort rosc roso ross rost rotc rotk roto rotr rots rott rrrr rscc rscs rsdd rsds rsos rsts rtcc rtdt rtss rtts s-os sbbs sbcc sbcs sbct sbds sbor sbot sbrk sbsd sbst sbtc sbtk sccc sccs scct scdc scds sck- scob scok scoo scor scot scr- scrc scrs scsc scsd scso scsr scst sctc sctd scto sctr scts sdcc sdco sddc sdds sdot sdrc sdrs sdsc sdss skor skot skrt sksd skss sobo sobr sobs sobt sock soco socr socs sodd sodo sods sokk soko sood sook soor soos soot sorb sord soro sorr sors sort soso soss sost sotc sotk soto sots srbc srcc srct sros srsd srtr ssbr sscc sscs ssdc ssdd ssoc ssot ssrc ssrs sssb sssc ssss sstb sstc sstd ssts stbc stbd stbs stcc stcs stds stks stob stod stok stoo stor stos stot strc strd strk stro strs stss sttc sttd sttr tbbs tbcb tbcc tbcd tbrb tbst tcbs tccc tcdd tcos tctc tcts tddb tdkr tdor tdss tkod tkos tkts tobo tobs tobt tock toco todd todo tods todt toko tood took toor toos toot torc tord tork toro torr tors tort tosb tosc