peir peit peor pepe pepi pepo per- pere perf peri pero perp perr pert pete peti peto petr pett pfet pfff pffr pfft pfit pfte pibb pibi piep pier piet piff piip piob piot pipe pipi pipo pipp pire piri piro pirr pite pitf piti pito pitr pitt pobo poer poet poff pofi poio poof poop poor poot pop- pope popi popo popp popt porb pore pori poro porr port pote potf poti poto pott pper ppib ppie ppif pppo pppp pprf pptt pre- preb pree pref prep pret pri- prie prif prii pro- prob proe prof proo prop prot prri prti prtp prtr pter ptop ptrf rbbb rbbr rebb rebe rebo reeb reef reep reet refe reff refi refr reft reif reii reir reit reof reop reot repe repi repo repp repr rept rere reri rero rert rete reti reto retr rett rfef rib- ribe ribo rief riep rier riet rife riff rift riif riot ripe ripi ripp ripr ript rire riri rite riti rito ritt rob- robb robe robi robo robt roer roet rofe roff rofo roif roio roir roit roob roof rooi roop roor root rope ropo rore rori roro rort rote roti roto rotr rott rpet rpii rpob rpoe rpof rrif rrrr rtbf rtee rtei rtfb rttp tbit tbrb tbtp tebo teef teer teet teff tefi teft teie teip teir teor tepe tepi tepp ter- tere terf teri tero terp terr tete teti teto tetr tett tfeb tfot tfpt tftp tibi tie- tiee tief tiei tieo tiep tier tiet tiff tifo tift tiit tiop tip- tipe tipi tipo tipp tipt tirb tire tiri tiro tirr tite titi tito titp titt tobe tobi tobo tobt toee toei toer toet toff tofi tofo toft toie toit toof toor toot top- tope topf topi topo topp topt tore torf tori toro torp torr tort tote toti toto totr tott tper tpir tppp tppr tpte tptp tptr tre- tree tref trei treo tret trfr tri- trib trie trif trio trip trit troe troi troo trop trot trpe trpp trte trtr ttbb tteo tter ttff ttoe ttop tttt

-tree bbbee be-er be-ro beber bebop bebot bebti beebe beeft beepi beeri beete beffe befie befit befoe befor beibi beier beife beire beite beofe beoff beoir beote bepop beppe beppo berbe berei beret berie berio berit berob beroe beror berre berri berte berti berto betee beter betie betio betoo betor betre bett- bette betti betto bibbe bibbo biber bibie bibio bibri biebe biefe biere bieri biert bieti bifer biffi biffo bifor biore bipib birie biter bitit bitof bitop bitte bitti bitto bo-bo bobbi bobet bobr bobre bobri boero bofet boffi boffo boibe boier boire boiro boite boito booer booit boore boort bopet bopit borbo boree borer boret borio boro- boroo borot borre borro botet botie botro botte botti breef breer breet breit breo- brere breto brett bribe brief brier briot brite brito britt brobo broer broft broto brrrr btr-t e-fit e-pro ebber ebbet ebbie ebert ebibe ebrio eeeee eepee eerie eetti efere eferi efetf effer effet effie effio efore efrei efter eieio eipri eirie eiter eitri eofor eorre epopt epote eppie epptb eptfe erbbe erber erept erere erier eriff erio- erite eroor erore eroto error erte erter etete etio- etite etoro etree etter ettie febio febre feeor feere fefor feier feoff feret ferie ferio ferit ferr- ferre ferri ferro ferte feter feti- fetii fetir feto- fetor fette fiber fibr- fibre fibro fieee fieri fiero fifer fifie fiore fiori firee firei firer firie firit firpo firre fitit fitof fitor fitri fitte fitto foeti foir- foire foore foote footi fore- foreo foret forio forit forro forte forti forto fotte fprot freei freep freer freet freir freit frere frett frier fripp frite frito fritt frobe froit froop froot frore frote ftrtt i-beo i-bet i-bot ibeof ibero ibert ibeti ibibo ibore iebet ieiri iepe ieper ierei ieroe iette if-- ifere iffet ifrit iftop ifttt iiiee iiiii iitti iobit ioffe ioooi ioooo iorio iotit iotti iperf ipeti ipiti ipopt iport ippee ippei irbit irepo irete irite irobo irori irrep irrit itbit itero itete itfet itfit itfor itire itobi itoff itpro itrip itter ittoo ittre ittti o-fer o-r-b obbet obeie obert obete oboro obote obreb oeiro oeppo offer offie offir offit offof offre offto ofori ofoto ofpie ofpop ofter oirot oitti oo-er oobit ooioo ooooo oorie opepe opere opier opiet opio- opir opito opobo opper oppie opter optio opto- optot optto orbit orbot orebi oreo- oreoi orere orero orfei orfeo orfoe orfor oribe oribi orito orobe orobo oroer oropi orpit orret orter ortet ortoo otere oteri otero otobi otori ototo otpor otter ottir ottoi p-rep pebi- pebie pebre peebo peere peeri peert peete peire peirt pepee pepoi peppe peppi pept- pepto perer peret peri- perie perio perit perot perre perri perro perte perti perto petbe peter petie petit petr- petre petri petro pette petti petto pforp pibor piere pieri piero piert piibe piiri piotr piper pipet pipit pippi pippo pipri pirie pirot pirre pirri pirro piter pitie pitio pitip pitof pitot pitre pitri pitti pitto po-po pobe poeir poete poeti poiet poire poite pooer poope poopo poore poori poort poote poper popet popoi popop poppe poppi poppo poreb porer poret poro- poroi porri porro porte porto poteb potee poter potof potoo potop potor potpe potro potte potti potto preef preff preie preif preop prete preti preto prief prier prife priit priob prior prite priti pritt probe probo proer profe proff proft proif proof proor proot prop- prope propp propr propt prore prot- proti proto prtor pter- ptere pteri ptero ptprb ptpre ptprf ptpro ptprr ptprt rebbe reber rebet rebit rebop reefe reeft reepe reere reeti refer refet reffe reffo refit reiff reoti repet repit repop repor repot reppe repro reprt rere- reree reret rerip rerir rerob retee reter retie retip retop retro rette retto ri-fi ribbi riber ribet ribie ribo- ribot riefe rieti rifer riife riper ripio ripit rippe ririe ro-ro robbe robbi robbo rober robie robo- robop robor robot robrt robte roero roffe rofor roiot roite rooer roofe