c-cd cccc cccu cccv ccdc ccdr cced ccee ccoc ccod ccrc ccre ccuc ccvo cd-e cd-r cddr cdec cder cdre cdvd cec- cece ceco cedd cede cedo cedu ceec ceke ceor ceou cer- cerc cerd cere cero cevo ckck ckco ckcv ckdo ckdu cker ckoc ckoo ckor ckrc ckrd ckvo coce cock coco cocu codd code coed cok- coke coko cood cook cor- corc cord core cork coro corr coud coue couk cour cove covo crcc crce crcr crdc cre- crec cred cree creo creu crkc croc crod croe crok croo cror crud crue cruk cucc cuce cuck cude cued cuek cuer cuk- cuke curd cure curo curr cuve cvcc cver cvrd cvrr dccc dccu dccv dcrk dcvd dddd ddoc ddrc ddre dec- decc decd dece deck deco dedd dede dedo dedu deed deek deer deev dek- deke deor der- derc dere derk dero derr derv deue deuk deur deve devo dkdc doce dock doco docu dod- dodd dode dodo doek doer doke doko dood dook door dorc dord dore dork doro dorr doru douc doud doue douk dour dove dred dree drek drev drod drou drue druk druu druv duce duck duco dudd dude dudo dudu duer duke duku duo- dure durk duro duru duur duve dvdr dvor eccc ecce ecco ecdc eced ecko eco- ecod ecou ecrc ecrr ecru ecrv eddc edde eddo ede- eder edoc edod edou edru educ edur edve eede eedu eeee eeke eeoc eerc eero ekco eked ekek eker ekur eocd eode eore ercc erce erde erec ered erer erev erke eroc erod eroe eroo errc erre erro eruc erur eruv erve eucd eude euer eur- eurc eure euro ever evoe evoo evre evvk kccc kccd kcck kccr kccu kccv kcdc kcdd kcdr kcdu kcdv kcec kced kcee kceo kceu kckc kckk kcko kckr kckv kcoe kcor kcou kcrc kcro kcrr kcru kcrv kcue kcuk kcvd kcvk kcvo kcvr kcvu kcvv kdcc kdcd kdce kdco kdcr kddc kddd kddk kddr kdec kdkd kdkk kdko kdkr kdoc kdoe kdok kdov kdro kdrv kduc kdur kduv kdvr kdvv keck keco kecr kedc kedd kede kedo kedr keed keek keer kekc keke keko keku keok ker- kerc kere kerk kero kerr keru kerv keur keve kkcd kkck kkco kkcr kkdc kkdd kkdo kkdv kked kkkk kkoo kkor kkov kkrc kkre kkrk kkro kkrr kkrv kkuu kkvr kkvu kkvv kocd kock kode kodk kodo kodu kodv koed kokc koke kokk koko kokr koku kooc kook kooo koor koou koov korc kord kore kork koro korr koru korv koue kour kouu kovc kove kovk kovo kovr krcc krcd krce krco krcu krdc krdd krde krdo krdr krdu krec kred kree krek kreo kreu krev krkc krkd krke krkk krko krkr krku krkv kroc krod kroe krok kroo kror krov krrc krre krrk krro krrr kruc krue kruk krur krvc krve krvk krvo krvr krvv kucc kucd kuce kuco kucr kucv kudd kude kudo kudu kued kuek kueu kuke kukk kuku kuok kuoo kurd kure kurk kuro kurr kuru kurv kuuk kuur kuuu kuvo kuvr kvcc kvce kvck kvco kvcr kvcu kvcv kvdu kvec kver kvoc kvod kvoe kvok kvoo kvor kvou kvov kvrc kvre kvro kvrr kvrv kvue kvuu kvvr kvvv o-eo occc oce oced ocee ocke ocre ocro ocrr ocur oddd oded odeo oder odoo odor odou odur oec- oecc oedo oeec oere okcu oked oker okko okok okor okre okro okur oocr ooer ooku oooo oord oore orce orco orde ordo ordu ore- orec ored orek oreo orer orke orko oro- oroe orok oror orro orve orvr oucc oudc oude oued ouer our- oure ouro ouu- ovde ovee over ovo- ovod ovoo ovre rccc rcdc rcde rcrd rcuv rcvr rder rdev rdoc recc recd rece reck recr recu redc redd rede redo redr redu reed reek reev reke reko reod reou rerd rere rero reru reue reuk reuu revd reve revo rocc roce rock roco rodd rode rodo roed roer roev roke rokk roko rokr roku rood rook roor rorc rore rork roro roru roud roue rouk rove rovo rred rrrr ruce ruck rudd rude rudo rued ruer ruke rukk ruku ruok rurc rurd rure ruro ruru ruud ruve ruvu rv-c rved rver ucdc ucdd ucrc uder udev udoo uduk ukcc ukek ukeu ukko ukok ukrc ukur uocc uoke uor- uore uovo urde urdu ure- ured urke uro- urok uroo urre uruk urur urve uuoc uuuu uv-c uver uvok uvrd uvvu vdcc vdec vder vdre vecc veck vedc vede vedo veer veke veor ver- verd vere verk vero veur veve vevo vkor voce vode vodo voer voeu voke vooc voor vor- vord vore voro voru voud voue vouk vour vovk vred vreo vroc vruk vuco vudu vuku vver vvvv