orlo oro- oroe orof oror orot orra orro orta ortc orte orto otac otar otcl otea otee oter otfc oto- otoe otof otoo otor otra otre otro otta otte otto raaf raat rac- raca racc race raco ract raec raef rael raer rafa rafc rafe raff raft rala rale ralf rall ralo ralt raoc raol rara rare rarf raro rata rate ratf rato ratt rcac rcaf rccc rcet rcfc rcle rctc rea- reac reae reaf real reao rear reat reca recc rece recr rect reef reel reet refe reff refl refr reft rela rele rell relo relt reof reol reot rera rere rero rert reta rete reto retr rett rfae rfef rffc rffl rftc rlee rlef roaf roar roat roca rocc roce roco roea roel roer roet rofc rofe roff rofl rofo rola role rolf roll rolo rolt roof rool roor root rora rorc rore roro rort rota rotc rote rotl roto rotr rott rrat rrfc rrle rrrr rtca rtcc rtce rtee rtfc rtle rtlt taa- taaf taal taar taat taca tacc tace tacl taco tact taec tael taer tafa tafc tafe taff tafo taft tala talc tale tall talo taoa taor tara tarc tare tarf taro tarr tart tata tate tato tatr tatt tcca tccc tcfc tctc teac teal tear teat teca tecl teco tecr tect teec teef teel teer teet tefc teff tefl teft tel- tela telc tele tell telo telt teor ter- tera terc tere terf tero terr teta tete teto tetr tett tfae tfal tfca tfec tfot tftc tlac tlco toal toat toca toce toco toea toee toer toet tofa toff tofo toft tol- tola tole toll tolo tolt tooa toof tool toor toot tora torc tore torf toro torr tort tota totc tote toto totr tott traa trac trae traf tral trao trat trca trcc trcl tre- trea trec tree tref treo tret trfc trfr troa troc troe troo trot trra trtc trte trtr tteo tter ttfa ttfc ttff ttoe tttt