-tree eeeee eepee emeer emere emert emmer emmet empee empte emtee erem- erept erere erte erter etete etext etree etter exeem exeme exept exert exmet exper exptr exter extre meere meete memer memex merer meret merre merte meter metr- metre metrx mette mexer mmmmm mpret mrmet mt-te mt-tm mt-tp mt-tr mt-tt mtepe mtree p-rep peere peert peete pemex pepee peppe pept- perer peret perre perte peter petr- petre pette preem preme premp prete pter- ptere ptpre ptprm ptprr ptprt reeme reepe reere remee remer remet remex repet reppe reprt rere- reree reret retee retem reter retex rette rexer rtext t-rex teeme teepe tempe tempt tepee tepet terem teret terex terme terre tert- teter tetex tetr- tette texte treer treet treme tremp trepp trept trere trete trett ttttt xerem xerte xetex xexex xmmer xterm xtext xtree