ptab ptak pter pttk raab raak raat raba rabb rabe rabi rabk raep raer raia raie raii raik raip rair rait raka rake raki rakk rakt rapa rape rapi rapp rapt rara rarb rare rari rark rata rate rati ratk ratp ratt rbbb rbbr rea- reae reak reap rear reat reba rebb rebe rebk reeb reek reep reet reia reii reik reir reit reka reke reki rekt repe repi repp repr rept rera rere reri rert reta rete reti retr rett riaa riab riai riak riat rib- riba ribe riek riep rier riet riia rika rike riki rikk ripa ripe ripi ripp ripr ript rire riri rita rite riti ritt rpet rpii rpta rrat rrrr rtai rtee rtei rtpa rttp taa- taar taat taba tabb tabe tabi taer taia taik taip tair tait taka take taki takk takt tapa tape tapi tapp tapr tapt tara tarb tare tari tark tarp tarr tart tata tatb tate tati tatr tatt tbar tbit tbrb tbta tbtp teak tear teat teba teek teer teet teia teie teip teir teka teke tepa tepe tepi tepp ter- tera tere teri terk terp terr teta tete teti tetr tett tiaa tiab tiar tiba tibi tie- tiea tiee tiei tiep tier tiet tiit tika tike tiki tip- tipa tipe tipi tipp tipt tira tirb tire tiri tirr tita tite titi titp titt tkip tpap tper tpia tpir tpke tppa tppp tppr tpte tptp tptr traa trab trae trai trak trap trat tre- trea tree trei trek tret tri- tria trib trie trik trip trit trpa trpe trpp trra trte trtr ttab ttbb tter tttt