iccr icct iccu icec icee icer icet icey icoc icor icpc icpo icrc icre icrr icrt icru icry ictp icue icup iecc ieet ieie ieio iere ieri iett iiie iiii iiio iiit iioi iioo iiop iirc iitr iitt iiuc ioci iocp ioee ioii ioio ioit iooi iooo iore iori iote ioto ipcc ipce ipct ipec iper ipet ipie ipoe ipop ippc ippo ippr ippy ipri iptc ipto ipur iput ircc ircu iree irer iri- iric irie irio irip iriy iroc irop irpc irpe irrc irre irri irte irti irtp itec itep iter itet itic itie itoi itoo itor itou itpc itri itry itto itty itup itur iucc iuce iuiu iupp iuty iyer iyet iypt iyre o-eo occc occi occt oce ocee ocet ocpp ocre ocro ocrr oct- octe octi octo octy ocur oec- oecc oeec oere oeti oeye oeyo oici oier oiii oipc oire oirt oiry oitc oiti oocr ooer oooo oore oort oory ootp ooty opec opei opep oper opet opic opie opii opio opit opo- opor oppi oppo oppy opry opti opto opye orce orci orco ore- orec oreo orer orey ori- oric orie orio orit oro- oroe oror orot oroy orpc orpe orpi orri orro orry ortc orte orto orup otee otep oter otic otit oto- otoe otoo otor otoy otpp otre otro otry otte otti otto ottu otur otyr oucc ouer ouie ouii ouir ouit oupe our- oure ouro ourt out- oute outi outo outy ouu- ouyr oyce oyee oyer oyeu oyou oyre oyri pccc pcce pcep pcer pcip pcoe pcpp pcrc pcre pcte pece peci peco pecr pect pecy peec peep peer peet peio peip peir peit peor peou pepe pepi pepo per- perc pere peri pero perp perr pert peru pery pete peti peto petr pett pety peur peut peyo peyr picc pice pici pico picr pict picu picy piep pier piet piip piot pipe pipi pipo pipp pipy pirc pire piri piro pirr piru piry pite piti pito pitr pitt pitu pity piye piyo poce poco poer poet poey poio poop poor poot pop- popc pope popi popo popp popt popy porc pore pori poro porr port pory potc pote poti poto pott potu poty poui poup pour pout pouy poyo poyr ppcc ppci pper ppic ppie pppo pppp pprc ppru pptt ppur ppye prcc prcp pre- prec pree prep pret preu prey pri- prie prii pro- proc proe proo prop prot prou prri prtc prti prtp prtr prue prut pruu ptcc pter ptop pttc ptui pu-e puce pueo puer puet pueu puir puit puiu puoy pupe pupi pupu pupy pur- pure puri puro purp purr puru pury put- pute puti puto putt putu puuc puy- puyi puyo puyt pyce pyep pyet pyic pyo- pyot pype pypy pyr- pyre pyri pyro pyry pyte pytt rccc rcep rcet rcic rcpi rcpo rcpt rctc rcti rcyc recc rece reci recp recr rect recu recy reep reet reii reir reit reiu reop reot reou repe repi repo repp repr rept repu repy rere reri rero rert reru rery rete reti reto retr rett rety reue reup reut reuu reye ricc rice rico rict riep rier riet rieu riot riou ripe ripi ripp ripr ript rire riri rite riti rito ritt ritu riue riyo rocc roce roco roer roet roey roio roir roit roiu rooi roop roor root rope ropo ropy rorc rore rori roro rort roru rory rotc rote roti roto rotr rott roty roue roup rout rouy roye royt rpet rpii rpoe rpyc rrrr rtcc rtce rtee rtei rttp ruce ruci ruct ruer ruet ruit ruoy rupe rupp rupt rupy rurc rure ruri ruro rurp ruru rute ruti ruto rutt rutu ruty ruyi ryet ryip ryot rype rytt ryue ryyt tccc tccu tcep tcpo tcpy tctc teco tecr tect teec teer teet teic teie teip teir teiu teor tepe tepi tepp tepu ter- terc tere teri tero terp terr teru tery tete teti teto tetr tett tetu teut teye teyr ticc tice tico tie- tiee tiei tieo tiep tier tiet tiit tiiu tiop tiou tip- tipc tipe tipi tipo tipp tipt tipu tire tiri tiro tirr tiru tiry titc tite titi tito titp titt titu tiye tiyi tiyo to-y toce toci toco toee toei toer toet toey toie toit toor toot top- tope topi topo topp topt topu torc tore tori toro torp torr tort toru tory totc tote toti toto totr tott toty toui toup tour tout toyo toyt tpcp tper tpir tppp tppr tpte tptp tptr tput tpyo trcc tre- trec tree trei treo tret treu trey tri- tric trie trio trip trit troc troe troi troo trop trot trou troy trpc trpe trpp trtc trte trtr truc true trut truu try- trye tryo tryp ttcp tteo tter ttoe ttop ttoy tttt tucc tuco tuei tuer tuet tuey tuit tuiu tuor tupe tupi tupo tupu tupy turc ture turi turo turp turr turt turu tury tute tuti tuto tutt tutu tuty tuuo tuye tyce tyco tyee tyer tyet tyir typ- type typo typp typy tyr- tyre tyro tyrr tyte tyti tyto tytt tyty tyup u-ie u-rp ucci uccp ucio ucrc ucut ueir uepi uipi uirr uocc uor- uore upci upic upie upor uppc uppe uppp uppu uppy upri upto upup urci urcy ure- uret urey uric urie uriu uro- uroo urpo urre urri urry urte urup urur urut utec utep uter utor utoy utri utti utto uttu uucp uuoc uuri uuuu uyir uyre yccc ycee ycie yctc ye-u yeep yeer yeet yeie yeii yeir yeit yeot yepe yepp yere yeri yero yerr yert yery yete yeti yeto yett yeue yeye yeyi yeyo yeyr yiet yipe yire yirr yite yiti yitp yoit yoop yoot yopo yopy yore yori yoro yort yory yote yott youe youi youp your yout yoye yoyo ypcc ypir yput ytre yuce yuer yuie yuit yupi yure yuri yurt yury yute yuto yutu yuty yuye yuyu yyyy

-tree c-cor c-p-c c-pop c-tec ccccc cccii ccett cciii ccitt ccoyo ceci- cecie ceco- cecri cecyt ceere ceipp ceirt ceoce ceoor cepci cepet cepic