otti otto otts rbbb rbbr rbbs rbcl rbis rbsl rbss rbst rcbc rcbo rccb rccc rccs rcgc rcic rcis rcls rcos rcrg rcsc rcsi rcsl rcss rctc rctg rcti rcts rgbi rgit rgtr rgts rib- ribo ribs ricc rico rics rict rigg rigi rigo rigs riis rill rilo riol rios riot riri rirs risc risi riso riss rist riti ritl rito rits ritt rlcg rlcs rlls rob- robb robi robo robs robt rocc roco rocs rogg rogi rogo roig roil roio roir rois roit roll rolo rolt roob roog rooi rool roor roos root rorc rori roro rort rosc rosi roso ross rost rotc rotg roti rotl roto rotr rots rott rrrr rsbi rscc rscs rsgb rsgc rsis rslc rsos rssl rsts rtcc rtcg rtgs rtls rtlt rtss rtts s-ib s-ic s-ii s-os sbbs sbcc sbcs sbct sbic sbig sbor sbot sbsi sbst sbtc scbi sccc sccl sccs scct scgs sci- scic scil scio scir scis scit scl- sclc scls scob scog scol scoo scor scot scr- scrc scri scrs scsc scsi scsl scso scsr scst sctc sctl scto sctr scts sgcb sgcg sggg sggs sgic sgio sglr sgls sgro sgss sgts sibc sibi sibo sibs sicc sici sico sics sigg sigi sigo sigs siit sil- silc sili sill silo sils silt siol sior sios siot sirc siri siro sirr sirs sirt sisc sisi siss sist sit- sitc siti sito sits sitt sl-i slcc slib slic slig slir slit slob sloc slog sloo slos slot slrc slrs slsc slst slts sobo sobr sobs sobt soci socl soco socr socs sogi sogo sogs soic soil soir sois soit soli soll solo solr sols solt soog sool soor soos soot sorb sorg sori soro sorr sors sort sosi soso soss sost sotc sotl soto sots srbc srcc srct srgb srib sris sros srtr ssbr sscc ssci sscs ssgs ssgt ssis ssit sslc sslt ssoc ssot ssrc ssrg ssri ssrl ssrs sssb sssc sssi ssss sstb sstc sstl ssts stbc stbs stcc stcs stgr stib stic stig stil stio stir stis stit stlc stlg stlo stlt stob stog stol stoo stor stos stot strc stri stro strs stsi stss sttc sttr tbbs tbcb tbcc tbgs tbil tbit tbrb tbst tcbs tccc tcos tctc tcts tgcc tgtc tgts tibi tibs ticc tico tics tigi tigr tigs tiit till tilo tilr tils tilt tios tirb tiri tirl tiro tirr tirs tisb tisi tiso tiss tist titc titi tito tits titt tlco tlgc tlli tlos tlrs tobi tobo tobs tobt toci toco togo togr togs togt toil tois toit tol- toli toll tolo tolt tool toor toos toot torc torg tori toro torr tors tort tosb tosc tosi toso toss tost totc toti toto totr tots tott trcc trcl tri- trib tric trig tril trio tris trit troc trog troi troo tros trot trsi trst trtc trtr tsbc tscc tscg tsgt tsig tsis tsob tsoi tsol tsos tssg tssi tssr tsst tstc tsts ttbb ttss tttt