cccc ccee cche cchr ccoc ccrc ccre cec- cece ceco ceec ceor cer- cerc cere cero cexe chce chch chec chee cheh cher chex choc choh choo chor chrc chro chrr coce coch coco coex coho cooh cor- corc core coro corr coxe crcc crce crcr cre- crec cree creh creo crex croc croe croh croo cror cxro cxxx eccc ecce ecco eche echo eco- ecrc ecrr eeee eeoc eerc eero ehcc eheh eher ehre eore er-x ercc erce erch erec erer erhc eroc eroe eroo errc erre erro exch exco exec exer exh- exo- exor exrx hccc hcch hech heer hehe heho heor herc here hero herr hex- hexe hhex hhhh hoce hoch hocr hoer hohe hoho hooe hoor hoox horc hore horo horr hree hrrc o-eo occc oce ocee oche ocre ocro ocrr oec- oecc oeec oere ohcc ohee oher ohho ohoh ohre oocr ooer ooho oooh oooo oore orce orch orco ore- orec oreh oreo orer orex orhe oro- oroe oror orro oxer oxo- oxox oxxo rccc recc rece rech recr rehe rere rero rexx rhce rhee rheo rhex rhoc rhoh rocc roce roch roco roer rohe rohr roor roox rorc rore roro roxo rrrr xeer xer- xero xexe xoco xoro xoxo xxxo xxxx