-tree e-pro eeeee eepee efere efetf effer effet efore efter eofor eorre epopt epote eptfe erept erere eroor erore eroto error erte erter etete etext etoro etree etter exept exert exopt exore exort exper expro exptr exter extre extro feeor feere fefor feoff feret ferox ferr- ferre ferro ferte feter feto- fetor fette fexpr foore foote fore- foreo foret forex forro forte forto fotte foxer foxxx fprot freep freer freet freex frere frett froop froot frore frote ftrtt fxpro o-fer oeppo offer offof offre offto ofoto ofpop ofter oo-er ooooo opepe opere opper opter opto- optot optto oreo- orere orero orexo orfeo orfoe orfor oroer orret orter ortet ortoo otere otero ototo otpor otter oxter p-o-x p-rep peere peert peete pepee peppe pept- pepto perer peret perot perox perre perro perte perto peter petr- petre petro pette petto pforp po-po poete pooer poope poopo poore poort poote poper popet popex popop poppe poppo porer poret poro- porro porte porto potee poter potof potoo potop potor potpe potro potte potto pppox preef preff preop prete preto proer profe proff proft proof proor proot prop- prope propp propr propt prore prot- proto prtor pter- ptere ptero ptpre ptprf ptpro ptprr ptprt reefe reeft reepe reere refer refet reffe reffo reorx repet repop repor repot reppe repro reprt rere- reree reret retee reter retex retop retox retro rette retto rexer ro-ro roero roffe rofor rooer roofe rooft roope roore roote roper roppe rorer roter roto- rotor rotot rotox rotte rotto rperf rprop rptor rtext t-pop t-rex t-top teepe tefe tepee tepet tepor teppo teret terex teror terre terro tert- teter tetex tetr- tetro tette texor texte toeof toerr toeto tofet toffo tofop tofor tofte toore topee toper topet topo- topof topor topot toppo topto toreo toret torpe torpo torre torro torte torto torxe toter totex toto- totoe totoo totop totte toxo- tprot treer treet trefe treff trepp trept trere trete trett troee trofe troff troft troop trop- trope tropo trott ttttt xero- xerox xerte xetex xexex xootr xorro xotox xoxox xtext xtort xtree