ntia ntto nttr oara obai obak oban obba obbo obia obin obit obkb oboi obok obon obor obot obra obri obro oiba oiii oiko oink oint oion oira oirt oita oiti okak okan okia okir okka okko okna okni okno okok okon okor okot okra okro okta okto onab onan onar onat onia onir onit onna onni onno onon onor onra ont- onti onto ooaa ooak ooba oobi ooia oona oont oooo oora oort ootb orab orai orak oran orao orar orat orba orbb orbi orbo ori- oria orin orio orit orka orko orna orni orno oro- orok oron oror orot orra orri orro orta orto otak otan otar otin otit oto- otok oton otoo otor otra otro otta otti otto raab raak raan raat raba rabb rabi rabk rabo raia raii raik rain rair rait raka raki rakk rakt rana rani rank rann rano rant raob raok rara rarb rari rark raro rata rati ratk rato ratt rbbb rbbr riaa riab riai riak rian riat rib- riba ribo riia riin rika riki rikk rina rink rinn rino rion riot riri rita riti rito ritt rnai rnbr rnin rnnt rnot roab roak roan roar roat rob- roba robb robi robo robt roia roik roin roio roir roit roka roki rokk roko rokr rona roni ronk rono ront roob rooi rook roon roor root rora rori rork roro rort rota roti rotk rotn roto rotr rott rrat rrna rrrr rtai rtan rtkn taa- taan taar taat taba tabb tabi tabo taia taik tain taio tair tait taka taki takk tako takt tana tani tank tann tano tant taoa taor tara tarb tari tark tarn taro tarr tart tata tatb tati tato tatr tatt tbar tbit tbrb tbta tiaa tiab tian tiao tiar tiba tibi tiit tika tiki tiko tina tini tink tinn tino tint tion tira tirb tiri tiro tirr tita titi tito titt tkon tnik toab toan toat toba tobi tobo tobt toit toka toki toko tona tonb toni tonk tonn tono tooa took toon toor toot tora tori tork torn toro torr tort tota toti toto totr tott traa trab trai trak tran trao trat tri- tria trib trik trin trio trit trna trno troa troi tron troo trot trra trtr ttab ttbb tton tttt