erce ercp erec erei erel erer eret eric erie eril erio erit erle erli erll eroc eroe eroi erol eroo erpe errc erre erro ertl etcc etco etec etee etel eter etic etio etoe etre etro ette etti etto iccc icci iccl icco iccp iccr icct icec icee icel icer icet icle icll iclp iclr icoc icor icpc icpo icrc icre icrr icrt ictp iecc ieet ieie ieio iele iere ieri iett iiie iiii iiio iiit iioi iioo iiop iirc iitr iitt ijet ijji ilce ile- ilec ileo iler ilet ilic ilie ilio ilir ilit ill- ille illi illo illp illt iloc iloo ilot ilpe ilpr ilre ioci iocp ioee ioel ioii ioio ioit iole iolo iooi iooo iopl iore iori iote ioto ipcc ipce ipct ipec iper ipet ipie ipil iplo ipoe ipop ippc ippo ippr ipri iptc ipto ircc iree irel irer iri- iric irie iril irio irip irje iroc irop irpc irpe irrc irre irri irte irti irtp itec itel itep iter itet itic itie itil itll itoi itol itoo itor itpc itri itto j-ro jccc jcci jcrc jeci jeel jeep jeer jeet jeit jeli jell jeol jere jeri jero jert jete jeti jetl jett jiet jije jiji jili jill jilt jipe jiri jiro jirt jiti jito jjcc joce joco joee joel joie joio joit joji jojo jole joli joll jolo jolt jool joor joot jope jore jorl joro jort joto jott jpcc jpet jpip jpop jpot jrtc jtcc jtip jtol lccc lcce lcer lcor lcpc lcpl lcrl lctl lcto lece leco lect leej leel leep leer leet leic leie leil leio leir leit lele leli lell lelo leoc leoi leor lepe lepi lepo lepp lept lerc lere lero lerp lert lete leti leto lett lice lico licr lict liel liep lier liet liii liir lij- lijt lile lili lill lilo lilt lio- lior lip- lipc lipe lipi lipl lipo lipp lirc lire liri lirl liro lirp lirr lirt lite liti litl lito litr litt llcc llet lllc llll lloc lloo locc loce loci loco loei loic loir loit loje lojo lole loli loll lolo looc looe looj lool loop loor loot lope lopi lopp lore lori loro lote loti lotl loto lotr lott lpec lppl lprp lric lroc lroi lrrc lrrr ltcc ltci ltee lttc lttr o-eo occc occi occt oce ocee ocet oclc ocpp ocre ocrl ocro ocrr oct- octe octi octo oec- oecc oeec oeil oele oere oeti oici oier oiii oipc oire oirt oitc oiti olcc ole- olei oleo oler olet olic olie olio olit olle olli ollo olor olot olpc olpe oocr ooer ooij ooji oolo oooo oore oort ootp opec opei opel opep oper opet opic opie opii opio opit ople opo- opoj opor oppi oppo opti opto orce orci orco ore- orec orel oreo orer ori- oric orie oril orio orit orji orle orlo oro- oroe oror orot orpc orpe orpi orri orro ortc orte orto otcl otee otep oter otic otit oto- otoe otoo otor otpp otre otro otte otti otto pccc pcce pccl pcep pcer pcip pcjj pcjr pcll pclo pcoe pcpp pcrc pcre pcrl pcte pece peci pecl peco pecr pect peec peel peep peer peet peil peio peip peir peit peje pel- pele pell pelo pelt peor pepe pepi pepo per- perc pere peri perl pero perp perr pert pete peti peto petr pett picc pice pici pico picr pict piel piep pier piet piip pil- pile pili pill pilo pilt piot pipe pipi pipo pipp pirc pire piri pirl piro pirr pite piti pito pitr pitt plcc plce ple- plec plee plei plej pleo plet plie plio plip plit ploc ploo plop plot plpp plri pltt poce poco poel poer poet poil poio poji pojo pole poli poll polo polt pool poop poor poot pop- popc pope popi popo popp popt porc pore pori poro porr port potc pote poti poto pott ppcc ppci pper ppic ppie pple ppli pplo pppo pppp pprc pptt prcc prcp pre- prec pree prel prep pret pri- prie prii prle prlr pro- proc proe proj prol proo prop prot prri prtc prti prtp prtr ptcc ptcl pter ptol ptop pttc rccc rcep rcet rcic rcle rcpi rcpo rcpt rctc rcti recc rece reci recp recr rect reel reep reet reii reil reir reit rele rell relo relp relt reol reop reot repe repi repl repo repp repr rept rere reri rero rert rete reti reto retr rett ricc rice rico rict riel riep rier riet riji rijo rijp rile rill rilo rilp riol riot ripe ripi ripl ripp ripr ript rire riri rite riti ritl rito ritt rlee rocc roce roco roel roer roet roil roio roir roit roje roji rojo role roll rolo rolp rolt rooi rool roop roor root rope ropo rorc rore rori roro rort rotc rote roti rotj rotl roto rotr rott rpet rpii rpoe rrle rrrr rtcc rtce rtee rtei rtle rtlt rttp tccc tcep tcpo tctc tecl teco tecr tect teec teej teel teer teet teic teie teil teip teir tejo tel- telc tele teli tell telo telt teor tepe tepi tepp ter- terc tere teri terj tero terp terr tete teti teto tetr tett ticc tice tico tie- tiee tiei tiel tieo tiep tier tiet tiit tiji tijo tile till tilo tilr tilt tiop tip- tipc tipe tipi tipo tipp tipt tire tiri tirl tiro tirr titc tite titi tito titp titt tlco tlli toce toci toco toee toei toer toet toie toil toit toji tojo tol- tole toli tolj toll tolo tolt tool toor toot top- tope topi topo topp topt torc tore tori toro torp torr tort totc tote toti toto totr tott tpcp tper tpir tpol tppp tppr tpte tptp tptr trcc trcl tre- trec tree trei treo tret tri- tric trie tril trio trip trit troc troe troi troo trop trot trpc trpe trpp trtc trte trtr ttcp tteo tter ttoe ttop tttt

-tree c-cor c-p-c c-pop c-tec ccccc cccii cccli ccell ccett cciii ccitt cclii ccrcl ccrel