-tree e-ten eeeee eener eenet eepee eeten enent enete ennet enper enten enter entex entre epeen epene ereen erept erere ernen ernet erte erter etern etete etext etnre etree etten etter exene exept exert exner exper exptr exter extre n-p-n neere nente neper neppe nepte neree neret nerre nerte neten netex netne nette nexen nextt nptxr ntete p-n-p p-rep peene peent peere peert peete pene- pener penex penne penre pent- pente pepee peppe pept- peren perer peret perne pernt perre perte peter petr- petre pette pptnt preen prene prent prepn prete prntr pter- ptere ptpre ptprn ptprr ptprt reene reepe reere renee rener renet renne rente repen repet reppe reprt rere- reree reret retee reter retex retnr rette rexen rexer rnpep rtenn rtext t-rex teepe tenen tener tenet tenex tenne tenpn tente tepee tepet teret terex terne terre tert- teten teter tetex tetr- tette texte tntnt treen treer treet trene trent trepp trept trere trete trett ttnet ttttt xerte xetex xexex xtext xtree