ohio ohoh ohre ohte ohto ohtu oici oier oigo oiii oipc oire oirt oitc oiti oocr ooer ooho oooh oooo oore oort ootp opec opei opep oper opet ophi opic opie opii opio opit opo- opor oppi oppo opti opto orce orch orci orco ore- orec oreg oreh oreo orer orge orgo orhe ori- oric orie orig orio orit oro- oroe oror orot orpc orpe orph orpi orri orro ortc orte orth orto orup otee otep oter othe otho othr otic otit oto- otoe otog otoh otoo otor otpp otre otro otte otti otto ottu otur oucc ouch ouer ouge ough ouie ouii ouir ouit oupe ouph our- oure ouro ourt out- oute outh outi outo ouu- pccc pcce pcep pcer pcgg pchp pcip pcoe pcpp pcrc pcre pcte pece pech peci peco pecr pect peec peep peer peet pegg pegh pego pegu pehe peho pehr peio peip peir peit peor peou pepe pepi pepo per- perc pere perg perh peri pero perp perr pert peru pete peth peti peto petr pett peur peut pgcc pgce pger pgou pgpu pgrc pgup phcc phe- phet phht phi- phip phit phog phoh phoo phot phrr phut picc pice pich pici pico picr pict picu piep pier piet pigc pigg pigh pigo pigp pigt pigu piip piot pipe pipi pipo pipp pirc pire pirg piri piro pirr piru pite pith piti pito pitr pitt pitu poce poch poco poer poet poge pogg pogh pogo poio pooh poop poor poot pop- popc pope popi popo popp popt porc pore porg pori poro porr port potc pote poth poti poto pott potu poui poup pour pout ppcc ppci pper ppgi pphi ppic ppie ppig ppih pppo pppp pprc ppru pptt ppur prcc prcp pre- prec pree preg prep pret preu pri- prie prig prii pro- proc proe prog proo prop prot prou prri prtc prti prtp prtr prue prut pruu ptcc pter ptop pttc ptui pu-e puce puch pueo puer puet pueu pugh pugo pugu puhi puig puir puit puiu pupe pupi pupu pur- pure purg puri puro purp purr puru put- pute puth puti puto putt putu puuc rccc rcep rcet rcgc rcic rcpi rcpo rcpt rcrg rctc rctg rcti recc rece rech reci recp recr rect recu reep reet rege regi rego regr regt regu rehe rehi reht reii reir reit reiu reog reop reot reou repe repi repo repp repr rept repu rere rerg reri rero rert reru rete reth reti reto retr rett reue reup reut reuu rgit rgtr rhce rhcg rhcp rhee rheo rhet rhio rhoc rhog rhoh rhue rhug ricc rice rich rico rict riep rier riet rieu rige rigg righ rigi rigo rigu riho riht riot riou ripe ripi ripp ripr ript rire riri rite rith riti rito ritt ritu riue rocc roce roch roco roeg roer roet roge rogg rogh rogi rogo rohe rohr rohu roig roio roir roit roiu roog rooi roop roor root rope ropo rorc rore rori roro rort roru rotc rote rotg roth roti roto rotr rott roue rouh roup rout rpet rpho rpii rpoe rrrr rtcc rtce rtcg rtee rtei rttp ruce ruch ruci ruct ruer ruet ruge rugg rugh rugi ruhe ruhh ruhi ruhr ruit rupe rupp rupt rurc rure ruri ruro rurp ruru rute ruth ruti ruto rutt rutu tccc tccu tcep tch- tche tchh tchi tcho tchp tchr tchu tcpo tctc tech teco tecr tect teec teer teet tegg tegh tegi tego tegt tegu tehi teho tehr teic teie teip teir teiu teoh teor tepe tepi tepp tepu ter- terc tere teri tero terp terr teru tete teth teti teto tetr tett tetu teut tgcc tgtc thch the- thec thee thei theo thep ther thet theu thhp thi- thic thie thig thio thir thoe thog thoo thor thot thou thpp thre thri thro thru thtr thue thug thur ticc tice tich tico tie- tiee tiei tieo tiep tier tiet tige tigh tigi tigr tiht tihu tiit tiiu tiop tiou tip- tipc tipe tipi tipo tipp tipt tipu tire tiri tiro tirr tiru titc tite tith titi tito titp titt titu toce toch toci toco toee toeh toei toer toet toge togh togo togr togt tohi toho tohu toie toit tooh toor toot top- tope toph topi topo topp topt topu torc tore torg tori toro torp torr tort toru totc tote toth toti toto totr tott toug touh toui toup tour tout tpcp tpeg tper tpir tppp tppr tpte tptp tptr tput trcc tre- trec tree treg trei treo tret treu trge tri- tric trie trig trio trip trit troc troe trog troi troo trop trot trou trpc trpe trpg trpp trtc trte trtr truc true trug trut truu ttcp tteo tter ttoe ttop tttt tucc tuch tuco tuei tuer tuet tugg tugh tugu tuht tuhu tuig tuit tuiu tuor tupe tuph tupi tupo tupu turc ture turg turi turo turp turr turt turu tute tuti tuto tutt tutu tuuo u-ie u-rp ucci uccp uche uchi ucho ucio ucph ucrc ucut ueir uepi ugcc ugcg ugeo ugep uggo uggt ughe ughi ugri ugro ugur uguu uher uhoh uhti uhuh uhup uige uipi uirr uocc uor- uore upci upgo upic upie upor uppc uppe uppp uppu upri upto upup urch urci ure- ureh uret urge urgh urgi urgu urho uric urie uriu uro- uroo urpo urre urrh urri urte urth urup urur urut utec utep uter uthe utor utri utti utto uttu utug uucp uuoc uuri uuuu

-tree c-cor c-p-c c-pop c-tec ccccc cccii ccett cciii ccitt cech ceche cechi cecht ceci- cecie ceco- cecri ceere cegep cegge cegui ceipp ceirt ceoce ceoor cepci cepet cepic cepie cepii cepot ceppo cerc- cerce cerci cerco cerec cerer ceret cerge ceric cerie cerio cero- ceroc cerou cerre cerro certe cetic ceto- cette ceuti chech cheep cheer cheet chege chegg chego cheho chehr cheir cheit cheo chepe chepi chepo chere cheri chero cherp chert cheru chete cheth cheto chett cheue chgrp chher chich chico chier chigi chigu chihe chiho chio- chiot chir- chire