-er eee eef eeo eep eer eet eex ef- efe eff efo efp efr eft efx eo- eoe eof eoo eop eor eot ep- epe epf epo epp epr ept epx ere erf ero erp err ert ete etf eto etp etr ett etx ex- exe exo exp exr ext exx fee fef feo fep fer fet fex ffe fff ffo ffp ffr fft ffx foe fof foo fop for fot fox fpe fpo fpp fpr fpt fpx fre frf fro frp frr frt fte ftf fto ftp ftr ftt ftx fxe fxp fxr fxt fxx oee oef oeo oep oer oet oex of- ofe off ofo ofp ofr oft ofx oo- oof ooo oop oor oot oox op- ope opf opo opp opr opt opx or- ore orf oro orp orr ort orx ot- ote otf oto otp otr ott ox- oxf oxo oxt oxx p-p pee pef peo pep per pet pex pfe pff pfo pfp pfr pft pfx poe pof poo pop por pot pox ppe ppf ppo ppp ppr ppt ppx pre prf pro prp prr prt prx pt- pte ptf pto ptp ptr ptt ptx pxe pxr pxt re- ree ref reo rep rer ret rex rfe rff rfo rfp rfr rft roe rof roo rop ror rot rox rpe rpf rpo rpp rpr rpt rpx rrf rrp rrr rrt rte rtf rto rtp rtr rtt rtx rxp rxr t-x te- tee tef teo tep ter tet tex tfe tff tfo tfp tfr tft tfx to- toe tof too top tor tot tox tpe tpf tpo tpp tpr tpt tpx tre trf tro trp trr trt trx tte ttf tto ttp ttr ttt ttx txe txf txt xee xep xer xet xex xfe xft xfx xof xoo xop xor xot xox xpe xpf xpo xpp xpt xrf xrt xrx xtf xtp xtr xtx xxo xxp xxx

eeee eefe eero eete eext efeo efet efor eft- eftp eore eoto epee eper epor epot epox eppo eppp epro eprp epte epxp er-x erer eret erft erfx eroe eroo erpe erre erro etee eter etfe etoe etox etre etro ette etto exer exfo exo- exor expo expr expt exrx exte extr feer feet fefe feff fefo feof fere fero ferr fert fete fetp fetr fett fext ffee ffff ffrr fftf foer fofo foof foot fopp for- fore foro forr fort fote foto fotp fott foxe foxx fprf free freo frep fret frex froe frop frot fter ftop ftpe o-eo oere ofer off- offe offo offr ofor ofre oftp ooer ooff oooo oore oort ootp opep oper opet opex opo- opor oppo opto ore- oreo orer orex orfe orff oro- oroe orof oror orot orpe orro orte orto otee otep oter otfp oto- otoe otof otoo otor otpp otre otro otte otto oxep oxer oxo- oxof oxox oxxo peep peer peet peff peor pepe pepo per- pere perf pero perp perr pert pete peto petr pett pfet pfff pffr pfft pfte poer poet poff poof poop poor poot pop- pope popo popp popt pore poro porr port pote potf poto pott pper pppo pppp pprf pptt pre- pree pref prep pret prex pro- proe prof proo prop prot prox prtp prtr pter ptop ptox ptrf reef reep reet refe reff refr reft reof reop reot repe repo repp repr rept rere rero rert rete reto retr rett rexx rfef roer roet rofe roff rofo roof roop roor root roox rope ropo rore roro rort rote roto rotr rott roxo rpet rpoe rpof rrrr rtee rtex rttp teef teer teet teff teft teor tepe tepp ter- tere terf tero terp terr tete teto tetr tett tetx text tfot tfox tfpt tftp toee toer toet toff tofo toft toof toor toot top- tope topf topo topp topt tore torf toro torp torr tort torx tote toto totr tott tox- toxo toxt tper tppp tppr tpte tptp tptr tre- tree tref treo tret trex trfr troe troo trop trot trox trpe trpp trte trtr tteo tter ttff ttoe ttop tttt txtr xeer xefe xer- xero xert xexe xfer xftp xoro xorp xote xoxo xper xpot xpto xrep xtep xtro xxxo xxxx

-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