-tree eeeee eepee ekker ekuku ekuru epuku epure erept erere errtu erte erter eruke erupt eteke etete etree etrek etter eturu eurre k-p-r k-ute keepe keere keppe kerek kerep keret kerre kertu ketek keter kette kreek kreep kreke krepe krete kreuk krupp kukup kukur kuper kuppe kupur kurek kurku kurre kurte kuruk kurup kutte kuttu kutur p-rep peeke peere peert peete peket pekre pepee peppe pept- pepup perer peret perke perre perte perur peter petr- petre petru pette petur peure pre-k preke prete preuk prute pter- ptere ptpre ptprk ptprr ptprt ptpru puett puker pupet puppe puree purer purku purre purte puter putre putt- putte puttu putup re-up reepe reere rekke repet reppe reprt reput rere- reree reret retee reter rette reuer reuet reute rt-rk ruere ruete rukke rupee ruper ruter rutte ruutu teepe teeup teket tekke tepee tepet tepeu tepke teppu terek teret tereu terre tert- teter tetr- tette treer treet trepp trept trere trete trett treut truer truke trupt trute ttttt tukur tupee tupek turek turet turku turre turtu turup turut tutee tutku tutte tuuru ukeep ukeke ukert upeet upper upput upter urker urkut urpek urter urupe urutu uter- utter uttur uturu uuuuu