cccc cccp cccu ccee ccpe ccpp ccpr ccrc ccre ccrp ccuc ccup cec- cece cecp ceec cepc cepe cepp cepr cer- cerc cere cerp cpce cpcu cpep cper cpre crcc crce crcr cre- crec cree crep creu crpc crue crup cucc cuce cuer cupe cupp cupr cure curr eccc ecce ecpp ecrc ecrr ecru eeee eerc epcc epec epee eper eppc eppp eprp ercc erce ercp erec erer erpe errc erre eruc erur euer eur- eurc eure pccc pcce pcep pcer pcpp pcrc pcre pece pecr peec peep peer pepe per- perc pere perp perr peru peur ppcc pper pppp pprc ppru ppur prcc prcp pre- prec pree prep preu prue pruu pu-e puce puer pueu pupe pupu pur- pure purp purr puru puuc rccc rcep recc rece recp recr recu reep repe repp repr repu rere reru reue reup reuu rrrr ruce ruer rupe rupp rurc rure rurp ruru u-rp uccp ucrc uppc uppe uppp uppu upup ure- urre urup urur uucp uuuu