cccc cccu cccv ccee ccoc ccrc ccre ccuc ccvo cec- cece ceco ceec ceke ceor ceou cer- cerc cere cero cevo ckck ckco ckcv cker ckoc ckoo ckor ckrc ckvo coce cock coco cocu cok- coke coko cook cor- corc core cork coro corr coue couk cour cove covo crcc crce crcr cre- crec cree creo creu crkc croc croe crok croo cror crue cruk cucc cuce cuck cuek cuer cuk- cuke cure curo curr cuve cvcc cver cvrr eccc ecce ecco ecko eco- ecou ecrc ecrr ecru ecrv eeee eeke eeoc eerc eero ekco ekek eker ekur eore ercc erce erec erer erev erke eroc eroe eroo errc erre erro eruc erur eruv erve euer eur- eurc eure euro ever evoe evoo evre evvk kccc kcck kccr kccu kccv kcec kcee kceo kceu kckc kckk kcko kckr kckv kcoe kcor kcou kcrc kcro kcrr kcru kcrv kcue kcuk kcvk kcvo kcvr kcvu kcvv keck keco kecr keek keer kekc keke keko keku keok ker- kerc kere kerk kero kerr keru kerv keur keve kkck kkco kkcr kkkk kkoo kkor kkov kkrc kkre kkrk kkro kkrr kkrv kkuu kkvr kkvu kkvv kock kokc koke kokk koko kokr koku kooc kook kooo koor koou koov korc kore kork koro korr koru korv koue kour kouu kovc kove kovk kovo kovr krcc krce krco krcu krec kree krek kreo kreu krev krkc krke krkk krko krkr krku krkv kroc kroe krok kroo kror krov krrc krre krrk krro krrr kruc krue kruk krur krvc krve krvk krvo krvr krvv kucc kuce kuco kucr kucv kuek kueu kuke kukk kuku kuok kuoo kure kurk kuro kurr kuru kurv kuuk kuur kuuu kuvo kuvr kvcc kvce kvck kvco kvcr kvcu kvcv kvec kver kvoc kvoe kvok kvoo kvor kvou kvov kvrc kvre kvro kvrr kvrv kvue kvuu kvvr kvvv o-eo occc oce ocee ocke ocre ocro ocrr ocur oec- oecc oeec oere okcu oker okko okok okor okre okro okur oocr ooer ooku oooo oore orce orco ore- orec orek oreo orer orke orko oro- oroe orok oror orro orve orvr oucc ouer our- oure ouro ouu- ovee over ovo- ovoo ovre rccc rcuv rcvr recc rece reck recr recu reek reev reke reko reou rere rero reru reue reuk reuu reve revo rocc roce rock roco roer roev roke rokk roko rokr roku rook roor rorc rore rork roro roru roue rouk rove rovo rrrr ruce ruck ruer ruke rukk ruku ruok rurc rure ruro ruru ruve ruvu rv-c rver ucrc ukcc ukek ukeu ukko ukok ukrc ukur uocc uoke uor- uore uovo ure- urke uro- urok uroo urre uruk urur urve uuoc uuuu uv-c uver uvok uvvu vecc veck veer veke veor ver- vere verk vero veur veve vevo vkor voce voer voeu voke vooc voor vor- vore voro voru voue vouk vour vovk vreo vroc vruk vuco vuku vver vvvv