-tree eeeee eepee egger egret epure erege erept erere errtu erte erter ertug erupt etete etree etter eturu eurre geere geert geete geeup gegge gerre gertt getee geter gette getup greer greet grege gregg grepe grete grett greup greut grgur grrrr grure gruut guere gurge gurre gurur gutte p-rep peege peere peert peete pepee peppe pept- pepup perer peret perge perre perte perur peter petr- petre petru pette petur peure pgrep prepg prete prute pter- ptere ptpre ptprg ptprr ptprt ptpru puett puget pupet puppe puree purer purge purre purte puter putre putt- putte puttu putup re-up reege reepe reere reger reget regge regtt regur regut repeg repet reppe reprt reput rere- reree reret retee reter retrg rette reuer reuet reute ruegg ruere ruete ruger ruget rugge rupee ruper ruter rutte ruutu teege teepe teeup tegre tegur tepee tepet tepeu teppu teret tereu terge tergu terre tert- teter tetr- tette teuge treer treet treg- trepp trept trere trete trett treut truer trugg trupt trute ttttt tupee turet turre turtu turup turut tutee tutte tuuru ugrug upeet upper upput upter urger urgut urter urupe urutu uter- utter uttur uturu uuuuu