eeee eero eore epee eper epor eppo eppp epro eprp erer erew eroe eroo erpe erre erro ewer ewew ewre o-eo oere ooer oooo oore opep oper opo- opor oppo ore- oreo orer oro- oroe oror orpe orro orwe orwo ower owoe owow owpe owre peep peer peor pepe pepo per- pere pero perp perr pewe poer poop poor pop- pope popo popp pore poro porr powe powp powr pper pppo pppp pre- pree prep prew pro- proe proo prop prow reep reop repe repo repp repr rere rero rewe roer roop roor rope ropo rore roro rowe rowp rowr roww rpoe rrrr weeo weep weer weop weow wepe wepp wepr wer- were wero werp werr werw wewe wewo woer woop woow wopp wore woro worp worr worw wowe wowo wowp woww wpeo wpep wper wpop wpor wpow wppr wpre wpro wprp wprr wree wrer wrew wroo wrop wrow wrpp wrpr wrpw wrre wrro wrrw wrwr wweo wwer wwor wwow wwpr wwpw wwre wwrr wwrw wwwe wwwr wwww