-er eee eef eeo eep eer eet eev ef- efe eff efo efp efr eft eo- eoe eof eoo eop eor eot ep- epe epf epo epp epr ept ere erf ero erp err ert erv ete etf eto etp etr ett etv eve evf evo evp evr evt evv fee fef feo fep fer fet fev ffe fff ffo ffp ffr fft ffv foe fof foo fop for fot fpe fpo fpp fpr fpt fpv fre frf fro frp frr frt fte ftf fto ftp ftr ftt ftv fvp fvt oee oef oeo oep oer oet of- ofe off ofo ofp ofr oft ofv oo- oof ooo oop oor oot oov op- ope opf opo opp opr opt opv or- ore orf oro orp orr ort orv ot- ote otf oto otp otr ott otv ov- ove ovf ovo ovp ovv p-p pee pef peo pep per pet pev pfe pff pfo pfp pfr pft pfv poe pof poo pop por pot pov ppe ppf ppo ppp ppr ppt ppv pre prf pro prp prr prt prv pt- pte ptf pto ptp ptr ptt ptv pve pvf pvo pvp pvr pvt pvv re- ree ref reo rep rer ret rev rfe rff rfo rfp rfr rft rfv roe rof roo rop ror rot rov rpe rpf rpo rpp rpr rpt rpv rrf rrp rrr rrt rte rtf rto rtp rtr rtt rtv rve rvf rvo rvp rvr rvt rvv te- tee tef teo tep ter tet tev tfe tff tfo tfp tfr tft to- toe tof too top tor tot tov tpe tpf tpo tpp tpr tpt tpv tre trf tro trp trr trt trv tte ttf tto ttp ttr ttt ttv tve tvf tvo tvp tvr tvt v-e vee vef veo vep ver vet vff vfp vfr vft vfv voe vof voo vop vor vot vov vpe vpf vpo vpp vpr vpt vre vrf vrp vrr vrt vte vto vtr vtt vtv vvo vvr vvt vvv

eeee eefe eero eete efeo efet efor eft- eftp eore eoto epee eper epor epot eppo eppp epro eprp epte eptv erer eret erev erft eroe eroo erpe erre erro erve etee eter etfe etoe etre etro ette etto etvo ever evet evoe evoo evop evre feer feet fefe feff fefo feof fere fero ferr fert ferv fete fetp fetr fett fetv feve fevr ffee ffff ffrr fftf foer fofo foof foot fopp for- fore foro forr fort fote foto fotp fott fove fprf fptv fr-v free freo frep fret froe frop frot frvt fter ftop ftpe o-eo oere oevp ofer off- offe offo offr ofor ofre oftp ooer ooff oooo oore oort ootp opep oper opet opo- opor oppo opto ore- oreo orer orfe orff oro- oroe orof oror orot orpe orro orte orto orve orvr otee otep oter otfp oto- otoe otof otoo otor otov otpp otre otro otte otto ovee over ovet ovo- ovoo ovot ovpp ovre peep peer peet peev peff peor pepe pepo per- pere perf pero perp perr pert perv 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 povo pper pppo pppp pprf pptt pptv pre- pree pref prep pret prev pro- proe prof proo prop prot prov prtp prtr pter ptop ptrf reef reep reet reev refe reff refr reft reof reop reot repe repo repp repr rept rere rero rert rete reto retr rett reve revo revp rfef roer roet roev rofe roff rofo roof roop roor root rope ropo rore roro rort rote roto rotr rott rove rovo rpet rpoe rpof rrrr rtee rttp rtve rver teef teer teet teev teff teft teor tepe tepp ter- tere terf tero terp terr tete teto tetr tett tfot tfpt tftp toee toer toet toff tofo toft toof toor toot top- tope topf topo topp topt topv tore torf toro torp torr tort torv tote toto totr tott tove tovo tper tppp tppr tpte tptp tptr tre- tree tref treo tret trev trfr troe troo trop trot trpe trpp trpv trte trtr tteo tter ttff ttoe ttop tttt tver tvro tvrr tvtv veep veer veet veor vepe vepr ver- vere vero vert vete veto vetr veve vevo vfor voer voet voff vofr voor voot vopt vor- vore voro vort vote voto votp vpro vref vreo vret vrot vrto vtpr vver vvvv

-tree e-pro eeeee eepee eevee eever efere efetf effer effet efore efter eofor eorre epopt epote eptfe erept erere ereve eroor erore eroto error erte erter etete etoro etree etter eveof evere evero everr evert evete evett eveve evoor evote fe-tv feeor feere fefor feoff feret ferr- ferre ferro ferte feter feto- fetor fette fever fevre foore foote fore- foreo foret forro forte forto forvo fotte fprot freep freer freet frere frett frevo froop froot frore frote ftrtt o-fer oeppo ofeve offer offof offre offto ofoto ofpop ofter oo-er ooooo oovoo opepe opere opovo opper opter opto- optot optto oreo- orere orero orfeo orfoe orfor oroer orret orter ortet ortoo orvet otere otero ototo otpor otrov otter ottov over- overo overt ovett p-rep peere peert peete peeve pepee peppe pept- pepto perer peret perot perov perre perro perte perto perve pervo peter petr- petre petro pette petto pforp po-po poete pooer poope poopo poore poort poote poove poper popet popop popov poppe poppo porer poret poro- porro porte porto potee poter potof potoo potop potor potpe potro potte potto pover povet povvo preef preff preop prete preto pretv preve proer profe proff proft proof proor proot prop- prope propp propr propt prore prot- proto prove provo prtor pter- ptere ptero ptpre ptprf ptpro ptprr ptprt pveto reefe reeft reepe reere reeve refer refet reffe reffo repet repop repor repot repov reppe repro reprt rere- reree reret retee reter retop retro rette retto revep rever revet ro-ro roero roffe rofor rooer roofe rooft roope roore roote roove roper roppe rorer roter roto- rotor rotot rotte