riri rita riti rito ritt roab roag roak roar roat rob- roba robb robi robo robt roga rogg rogi rogo roia roig roik roio roir roit roka roki rokk roko rokr roob roog rooi rook roor root rora rori rork roro rort rota rotg roti rotk roto rotr rott rrat rrrr rtai rtkg taa- taag taar taat taba tabb tabi tabo taga tagg tagi tago taia taig taik taio tair tait taka taki takk tako takt taoa taor tara tarb targ tari tark taro tarr tart tata tatb tati tato tatr tatt tbar tbit tbrb tbta tiaa tiab tiao tiar tiba tibi tiga tigi tigr tiit tika tiki tiko tira tirb tiri tiro tirr tita titi tito titt tkkg toab toat toba tobi tobo tobt toga togo togr togt toit toka toki toko tooa took toor toot tora torg tori tork toro torr tort tota toti toto totr tott traa trab trag trai trak trao trat tri- tria trib trig trik trio trit troa trog troi troo trot trra trtr ttab ttbb ttkg tttt