cccc cccu ccee ccoc ccrc ccre ccuc cec- cece ceco ceec ceke ceor ceou cer- cerc cere cero ckck ckco cker ckoc ckoo ckor ckrc coce cock coco cocu cok- coke coko cook cor- corc core cork coro corr coue couk cour 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 eccc ecce ecco ecko eco- ecou ecrc ecrr ecru eeee eeke eeoc eerc eero ekco ekek eker ekur eore ercc erce erec erer erke eroc eroe eroo errc erre erro eruc erur euer eur- eurc eure euro kccc kcck kccr kccu kcec kcee kceo kceu kckc kckk kcko kckr kcoe kcor kcou kcrc kcro kcrr kcru kcue kcuk keck keco kecr keek keer kekc keke keko keku keok ker- kerc kere kerk kero kerr keru keur kkck kkco kkcr kkkk kkoo kkor kkrc kkre kkrk kkro kkrr kkuu kock kokc koke kokk koko kokr koku kooc kook kooo koor koou korc kore kork koro korr koru koue kour kouu krcc krce krco krcu krec kree krek kreo kreu krkc krke krkk krko krkr krku kroc kroe krok kroo kror krrc krre krrk krro krrr kruc krue kruk krur kucc kuce kuco kucr kuek kueu kuke kukk kuku kuok kuoo kure kurk kuro kurr kuru kuuk kuur kuuu 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 oucc ouer our- oure ouro ouu- rccc recc rece reck recr recu reek reke reko reou rere rero reru reue reuk reuu rocc roce rock roco roer roke rokk roko rokr roku rook roor rorc rore rork roro roru roue rouk rrrr ruce ruck ruer ruke rukk ruku ruok rurc rure ruro ruru ucrc ukcc ukek ukeu ukko ukok ukrc ukur uocc uoke uor- uore ure- urke uro- urok uroo urre uruk urur uuoc uuuu