cccc ccee ccoc ccrc ccre cec- cece ceco ceec ceor cer- cerc cere cero cery coce coco cor- corc core coro corr cory coyo coyr crcc crce crcr cre- crec cree creo croc croe croo cror croy cry- cryo cyc- cycc cyre cyy- cyyc eccc ecce ecco eco- ecrc ecrr eeee eeoc eerc eero eery eore ercc erce erec erer eroc eroe eroo errc erre erro eryc erye eyec eyer eyey eyre eyry eyyr o-eo occc oce ocee ocre ocro ocrr oec- oecc oeec oere oeye oeyo oocr ooer oooo oore oory orce orco ore- orec oreo orer orey oro- oroe oror oroy orro orry oyce oyee oyer oyre rccc rcyc recc rece recr recy rere rero rery reye rocc roce roco roer roey roor rorc rore roro rory roye rrrr yccc ycee yeer yere yero yerr yery yeye yeyo yeyr yore yoro yory yoye yoyo yyyy