-tree e-ten eeeee eener eenet eepee eeten egene eggen egger eggng egner egret enent enete engen enger ennet enper enrge enten enter entre epeen epene ereen erege erept erere ergen ernen ernet erte erter etern etete etnre etree etten etter geere geert geete gegge gener genet genge genre gente geren gerre gertt getee geten geter gette gnptg green greer greet grege gregg grene greng grenn grent grepe grete grett grgen grrrr n-p-n neere neger negre nente neper neppe nepte neree neret nerre nerte neten netne nette ngege ngrep ntete p-n-p p-rep peege peene peeng peent peere peert peete pene- pener penge penne penre pent- pente pepee peppe pept- peren perer peret perge perne pernt perre perte peter petr- petre pette pgrep pptnt preen prene prent prepg prepn prete prntr pter- ptere ptpre ptprg ptprn ptprr ptprt reege reene reepe reere regen reger reget regge regne regtt renee reneg rener renet renge rengg renne rente repeg repen repet reppe reprt rere- reree reret retee reter retnr retrg rette rngtt rnpep rtenn teege teepe tegen tegre tenen tener tenet tenge tenne tenpn tente tepee tepet teret terge terne terre tert- teten teter tetr- tette tntnt treen treer treet treg- trene trent trepp trept trere trete trett ttnet ttttt