-tree eeeee eepee ekker erept erere erte erter eteke etete etree etrek etter k-p-r keepe keere keppe kerek kerep keret kerre ketek keter kette kreek kreep kreke krepe krete p-rep peeke peere peert peete peket pekre pepee peppe pept- perer peret perke perre perte peter petr- petre pette pre-k preke prete pter- ptere ptpre ptprk ptprr ptprt reepe reere rekke repet reppe reprt rere- reree reret retee reter rette rt-rk teepe teket tekke tepee tepet tepke terek teret terre tert- teter tetr- tette treer treet trepp trept trere trete trett ttttt