-tree eeeee eeler eepee eleet elele ellel eller ellet elpee elper erept erere erpel erte ertel erter etete etext etree ettel etter ettle exept exert exlex expel exper exptl exptr extel exter extre leell leere leert lelep lelex lelle lepel leper lepet leppe lepre lept- lerer letre lette lexer lexxe p-rep peele peell peere peerl peert peete pelee peler pelet pelle pepee pepel peple peppe pept- perel perer peret perle perre perte peter petr- petre pette pexel pleep pleet plete prell prelp prepl prete pter- ptere ptpre ptprr ptprt reepe reere relee relet relex relte repel repet reple reppe reprt rere- reree reret retee retel reter retex rette rexel rexer rtext t-rex teele teell teepe tele- telep teler telex tell- telle tepee tepet teret terex terre tert- tetel teter tetex tetle tetr- tette texel texte tlell tlett tpler treer treet trele trepp trept trere trete trett ttttt xerte xetex xexex xtext xtree