btrt bttb caaa caab caac caan caat caba cabe cabi cac- caca cacc cace caci cacr caec caei caen caer caia caib caic cain cair cait cana canc cane cani cann cant cara carb carc care cari carn carr cart cat- cata catb catc cate cati catt cbac cbar cbat cbbc cbca cbcc cbce cbcn cbcr cbct cbea cbec cbee cber cbet cbia cbir cbit cbna cbre cbrn cbrt cbta cbtc ccaa ccab ccac ccai ccar ccat ccba ccbc ccbn ccca cccb cccc ccci ccee ccic ccii ccir ccna ccnb ccnc ccne ccni ccnr ccra ccrc ccre ccri ccrt cctb cctc cctt ceac cean cear ceat ceba cec- ceca cece ceci cect ceeb ceec cen- cena cene ceni cent cer- cera cerc cere ceri cern cert cet- ceta cete ceti ciaa cian ciar ciat ciba cibc cibe cibi cica cicc cici cicr cict ciee cien cier ciia ciii ciit cin- cina cinc cine cini cint cira cirb circ cire ciri cirr cirt cita citb cite citi citt cnaa cnac cnbc cnci cnet cnib cnic cnie cnna cnrc cnrr cnrt cnta cntc cntr crab crac crai cran crar crat crbc crca crcc crce crcr cre- crea creb crec cree crei cren cret cria crib cric crie crin crit crna crne crrt crtc ctab ctae ctan ctba ctbi ctca ctec cten ctia ctic ctne ctrc ctrn ctta cttn eaba eaca eacc eaec eana eani eara earb eare earn eart eata eate eati ebac eban ebba ebbc ebbr ebcc eben eber ebic ebit ecaa ecac ecai ecan ecar ecat ecbc ecbe ecca eccb eccc ecce ecci ecct ecib ecit ecne ecra ecrc ecri ecrr ect- ecta ectc eeca eeea eeee eena eent eera eerc eeta eetc eete eica eiec eiei eien eier eina eine eini eira eire eirn eita eitb eitc eiti eitr enab enac enan enat enb- enbn enbr enca ence enci enea enee ener enin enit enna ennc enne enni enra enri ent- ente entr eran erat erba erbb erbe erca ercc erce ereb erec erei eren erer eret eria eric erie erin erit erna erne erni erra errc erre erta etai etan etat etbc etbr etcc etec etee eten eter etic etin etna etne etnr etra etre etta ette etti ettn i-be iaaa iaac iaai iaat iaba iaca iacc iacr iact iaea iaec iaia iain iana iane iara iarc iare iart iata iatc iate iati ibac iban ibar ibat ibca ibea ibec ibet ibia ibie ibra ibrc ibri ibtb ibtc icaa icab icac icai ican icar icat icbc icca iccb iccc icci iccn iccr icct icea icec icee icer icet icnb icnc icra icrc icre icrr icrt icta ieac ieat iecc ieet ieie iena ient iera iere ieri ieta iett iiac iica iiie iiii iiit iira iirc iita iitr iitt inab inac inae inai inan inar inat inba inbe inca incb ince inci incr inee inet inia init inna inne inni innr inra inre inri inta inti intn intr irac irae irai iran irar irbe irca ircc iree iren irer iri- iria iric irie irin irna irne irra irrc irre irri irta irte irti itaa itac itai itan itar itat itbe itea itec iten iter itet itia itic itie itin itra itri itta n-ii naaa naab naac naai naan naar naat naba nabc nabe nabi naca nacc nace naci naea naia naib naic naie nain nair nait nan- nana nanb nane nani nann nant nara narc nare nari narn narr nart nata natc nate nati natt nbaa nbar nbbc nbca nbcc nbci nber nbia nbic nbti ncaa ncac ncar ncat ncba ncbc ncbi ncca nccc ncci nccn nccr ncct ncea ncec ncee ncen ncer ncia ncit ncna ncnc ncra ncrc ncre ncri ncta nctc ncte nctr neab neac nean near neat neba nebb nebe nebn nebr neca necc nece necr nect neea neeb neei neen neer neet neia neic nein neir neit nena nene neni nent nera nerc nere neri nerr nert net- neta netb nete neti nett niab niac nian nibe nibi nica nicc nice nici niea nien nier niet niia niir niit nina nine nini nira nire nirt nita nitb nitc nite niti nitr nnit nnnn nntn nrab nrca nren nric nrna nrrc nrta ntbc ntcc nter ntia ntrc nttr raab raan raat raba rabb rabe rabi rac- raca racc race raci ract raec raen raer raia raic raie raii rain rair rait rana ranc rane rani rann rant rara rarb rare rari rata rate rati ratt rbbb rbbr rcac rcbc rccb rccc rcet rcic rcnr rctc rcti rea- reac reae rean rear reat reba rebb rebe reca recc rece reci recr rect reeb reen reet reia reii rein reir reit rena rene reni renn rent rera rere reri rert reta rete reti retr rett riaa riab riai rian riat rib- riba ribe rica ricc rice rict rien rier riet riia riin rina rine rinn rire riri rita rite riti ritt rnai rnbr rnie rnin rnnt rrat rrna rrrr rtai rtan rtca rtcc rtce rtee rtei taa- taan taar taat taba tabb tabc tabe tabi taca tacc tace taci tact taec taen taer taia tain tair tait tana tane tani tann tant tara tarb tarc tare tari tarn tarr tart tata tatb tate tati tatr tatt tbar tbca tbcb tbcc tbce tbit tbrb tbta tcca tccc tcnn tctc teac tean tear teat teba teca tecr tect teec teen teer teet teia teic teie tein teir tena tenb tenc tene teni tenn tent ter- tera terc tere teri tern terr teta tete teti tetr tett tiaa tiab tian tiar tiba tibi tica ticc tice tie- tiea tiee tiei tien tier tiet tiit tina tinc tine tini tinn tint tira tirb tire tiri tirr tita titc tite titi titt tnbc tnca tncc tneb traa trab trac trae trai tran trat trca trcc tre- trea trec tree trei tren tret tri- tria trib tric trie trin trit trna trra trtc trte trtr ttab ttbb ttcn tten tter tttt

-aaa- -tree a-iii aaaai aaace aaaee aaarc aaata aabaa aabba aabra aacbc aacte