osii osik osis oski osoi osoo osor osos osrd osro ossb ossd ossi osso osti ostr osts otbd otbs otis otit oto- otog otok otoo otor otos otro otrs otsg otso otti otto otts rbbb rbbr rbbs rbds rbis rbsd rbss rbst rdgs rdio rdos rdso rgbi rgds rgit rgtr rgts rib- ribo ribs ridd ridi rido rids rigg rigi rigo rigs riis riki rikk rios riot riri rirs risd risi risk riso riss rist riti rito rits ritt rkos rkss rkts rob- robb robi robo robs robt rodd rodi rodo rods rogg rogi rogo roid roig roik roio roir rois roit roki rokk roko rokr roks roob rood roog rooi rook roor roos root rori rork roro rort rosi roso ross rost rotg roti rotk roto rotr rots rott rrrr rsbi rsdd rsdg rsds rsgb rsid rsis rsos rsts rtdt rtgs rtkg rtss rtts s-ib s-ii s-os sbbs sbds sbig sbor sbot sbrk sbsd sbsi sbst sbtk sdds sdgs sdib sdio sdog sdot sdrs sdss sggg sggs sgio sgro sgsd sgss sgts sibi sibo sibs sidd sidi sido sidr sids sigd sigg sigi sigo sigs siik siit siki siko sikr siks siod sior sios siot siri sirk siro sirr sirs sirt sisd sisi sisk siss sist sit- sitd siti sito sits sitt skid skig skik skio skir skis skit skog skor skot skrt sksd skss sobo sobr sobs sobt sodd sodo sods sogi sogo sogs soik soir sois soit soki sokk soko sood soog sook soor soos soot sorb sord sorg sori soro sorr sors sort sosi soso soss sost sotk soto sots srgb srib sris sros srsd srtr ssbr ssdd ssgs ssgt ssid ssis ssit ssot ssrg ssri ssrs sssb sssi ssss sstb sstd ssts stbd stbs stds stgr stib stid stig stik stio stir stis stit stks stob stod stog stok stoo stor stos stot strd stri strk stro strs stsi stss sttd sttr tbbs tbgs tbit tbrb tbst tddb tdis tdkr tdor tdri tdss tgts tibi tibs tidd tids tigi tigr tigs tiit tiki tiko tios tirb tird tiri tiro tirr tirs tisb tisi tiso tiss tist titi tito tits titt tkkg tkod tkos tkts tobi tobo tobs tobt todd todi todo tods todt togo togr togs togt toid tois toit toki toko tood took toor toos toot tord torg tori tork toro torr tors tort tosb tosi tosk toso toss tost totd toti toto totr tots tott tri- trib trig trik trio tris trit trod trog troi troo tros trot trsd trsi trst trtr tsbd tsdb tsgt tsid tsig tsis tsks tsob tsoi tsos tssg tssi tssr tsst tsts ttbb ttkg ttss tttt