cccc ccee ccoc ccrc ccre cec- cece ceco ceec ceke ceor cer- cerc cere cero ckck ckco cker ckoc ckoo ckor ckrc coce cock coco cok- coke coko cook cor- corc core cork coro corr crcc crce crcr cre- crec cree creo crkc croc croe crok croo cror eccc ecce ecco ecko eco- ecrc ecrr eeee eeke eeoc eerc eero ekco ekek eker eore ercc erce erec erer erke eroc eroe eroo errc erre erro kccc kcck kccr kcec kcee kceo kckc kckk kcko kckr kcoe kcor kcrc kcro kcrr keck keco kecr keek keer kekc keke keko keok ker- kerc kere kerk kero kerr kkck kkco kkcr kkkk kkoo kkor kkrc kkre kkrk kkro kkrr kock kokc koke kokk koko kokr kooc kook kooo koor korc kore kork koro korr krcc krce krco krec kree krek kreo krkc krke krkk krko krkr kroc kroe krok kroo kror krrc krre krrk krro krrr o-eo occc oce ocee ocke ocre ocro ocrr oec- oecc oeec oere oker okko okok okor okre okro oocr ooer oooo oore orce orco ore- orec orek oreo orer orke orko oro- oroe orok oror orro rccc recc rece reck recr reek reke reko rere rero rocc roce rock roco roer roke rokk roko rokr rook roor rorc rore rork roro rrrr