rara rarb rarf rari raro rata ratf rati rato ratt rbaf rbbb rbbr rcac rcaf rcbc rcbo rccb rccc rcfc rcic rctc rcti rffc rfic rftc riaa riab riai riat rib- riba ribo rica ricc rico rict rifa riff rift riia riif riot riri rita riti rito ritt roab roaf roar roat rob- roba robb robi robo robt roca rocc roco rofc roff rofo roia roif roio roir roit roob roof rooi roor root rora rorc rori roro rort rota rotc roti roto rotr rott rrat rrfc rrif rrrr rtai rtbf rtca rtcc rtfb rtfc taa- taaf taar taat taba tabb tabc tabi tabo taca tacc taci taco tact tafa tafc taff tafi tafo taft taia taio tair tait taoa taor tara tarb tarc tarf tari taro tarr tart tata tatb tati tato tatr tatt tbaf tbar tbca tbcb tbcc tbit tbrb tbta tcca tccc tcfc tctc tfca tfot tftc tiaa tiab tiaf tiao tiar tiba tibi tica ticc tico tifa tiff tifo tift tiit tira tirb tiri tiro tirr tita titc titi tito titt toab toat toba tobi tobo tobt toca toci toco tofa toff tofi tofo toft toit tooa toof toor toot tora torc torf tori toro torr tort tota totc toti toto totr tott traa trab trac traf trai trao trat trca trcc trfc trfr tri- tria trib tric trif trio trit troa troc troi troo trot trra trtc trtr ttab ttbb ttfa ttfc ttff tttt