obot obra obro ocab ocac ocak ocam ocat ocbc occa occc occt ocma ocom ocra ocro ocrr oct- octa octo okak okam okka okko okmo okok okom okor okot okra okro okta okto omac omak omam omao omar ombo omca omma omo- omoa omoo omor omra omro ooaa ooak ooba oocr ooma oooo oora oort ootb orab orac orak oram orao orar orat orba orbb orbo orca orco orka orko orma ormo oro- orok orom oror orot orra orro orta ortc orto otac otak otar otma oto- otok otoo otor otra otro otta otto raab raak raam raat raba rabb rabk rabo rac- raca racc rack raco ract raka rakk rakt rama ramb ramm ramo raob raoc raok raom rara rarb rark raro rata ratk rato ratt rbbb rbbr rbmk rcac rcbc rcbo rccb rccc rctc roab roak roam roar roat rob- roba robb robo robt roca rocc rock roco roka rokk roko rokr roma romb romk romm romo roob rook room roor root rora rorc rork roro rort rota rotc rotk roto rotr rott rrat rrkm rrmc rrrr rtca rtcc rtcm rtmc t-mo taa- taar taat taba tabb tabc tabo taca tacc tack taco tact taka takk takm tako takt tama tamc tamm tamo taoa taom taor tara tarb tarc tark tarm taro tarr tart tata tatb tato tatr tatt tbar tbca tbcb tbcc tbrb tbta tcam tcca tccc tcom tctc tkac tmaa tmac tmbc tmbr tmca tmcc tmcm tmmk tmro tmtt toab toam toat toba tobo tobt toca tock toco toka toko toma tomb tomm tomo tomt tooa took toom toor toot tora torc tork torm toro torr tort tota totc totm toto totr tott traa trab trac trak tram trao trat trca trcc trma trmb trmk troa troc trom troo trot trra trtc trtr ttab ttbb ttma tttt