oosi oost ootb oots oous orbb orbe orbi orbo orbs orbu orce orci orco orcs ore- oreb orec oreo orer ores ori- oric orie orio oris orit oro- oroe oror oros orot orri orro orrs orse orsi orso orsu ortc orte orto orts orub orus osbe oscc osce osci osco osec osee osei oser oses oset osie osii osis osoi osoo osor osos osro ossb osse ossi osso ossu ostc oste osti ostr osts otbs otee oter otes otic otis otit oto- otoe otoo otor otos otre otro otrs otse otso otsu otte otti otto otts ottu otur otus oubs oucc ouer ouie ouii ouir ouis ouit our- oure ouro ours ourt ouse oust out- outb oute outi outo outs ouu- rbbb rbbr rbbs rbis rbss rbst rcbc rcbo rccb rccc rccs rcet rcic rcis rcos rcsc rcsi rcss rctc rcti rcts rebb rebe rebo rebs rebu recc rece reci recr recs rect recu reeb rees reet reii reir reis reit reiu reos reot reou rere reri rero rers rert reru rese resi reso ress rest rete reti reto retr rets rett reue reus reut reuu rib- ribe ribo ribs ribu ricc rice rico rics rict rier ries riet rieu riis rios riot riou rire riri rirs risc rise risi riso riss rist risu rite riti rito rits ritt ritu riue rius rob- robb robe robi robo robs robt robu rocc roce roco rocs roer roes roet roio roir rois roit roiu roob rooi roor roos root rorc rore rori roro rort roru rosc rose rosi roso ross rost rotc rote roti roto rotr rots rott roub roue rous rout rrrr rsbi rscc rscs rsee rsis rsos rsre rsts rstu rtcc rtce rtee rtei rtes rtss rtts rubb rube rubi rubs rubu ruce ruci ruct ruer rues ruet ruis ruit rurc rure ruri ruro rurs ruru ruse rusi ruso russ rust rusu rute ruti ruto ruts rutt rutu s-ib s-ic s-ii s-os sbbs sbcc sbcs sbct sber sbic sbor sbot sbse sbsi sbst sbtc sbus scbi sccc scce sccs scct scec scee scer scet sci- scic scie scio scir scis scit scob scoo scor scot scr- scrc scre scri scrs scsc scsi scso scsr scst scsu sctc scto sctr scts scub scur scut se-c se-e se-i se-o se-s se-t se-u sebe sebi sebo sebs sebt sec- secc sece seco secr secs sect secu seeb seec seer sees seet seeu seie seii seir seis seit seiu seoc seoi serb serc sere seri sero serr sers sert seru sesc sese sesi seso sess sest set- setc sete seti seto sets sett seui seur sibc sibe sibi sibo sibs sibu sicc sice sici sico sics sicu siec sier sies siit sioe sior sios siot siou sirc sire siri siro sirr sirs sirt siru sisc sise sisi siss sist sisu sit- sitc site siti sito sits sitt situ siue siui sius siut sobe sobo sobr sobs sobt sobu soce soci soco socr socs soec soeo soes soic soie soir sois soit soor soos soot sorb sore sori soro sorr sors sort soru sose sosi soso soss sost sotc sote soto sots sotu soue sour sous sout srbc srcc srct sreb srec sreo sres srib sris sros srtr srub ssbr sscc ssce ssci sscs ssec ssee sses sset ssis ssit ssoc ssot ssrc ssri ssrs sssb sssc sssi ssss sstb sstc ssts stbc stbs stcc stcs stcu stec stee steo ster stes stet stib stic stie stio stir stis stit stob stoe stoo stor stos stot stou strc stre stri stro strs stru stsi stss sttc sttr stub stuc stue stur stus stut sub- subb subi subo subs suc- succ suci sucr sucs suee suer sues suet sueu suie suio suir suis suit suor suos sur- surc sure suri suro surr surs surt suru sus- suse susi suso suss sust susu sute suti suto sutu suus tbbs tbcb tbcc tbce tbit tbrb tbst tcbs tccc tccu tcos tctc tcts tebo tebu teco tecr tecs tect teec teer tees teet teic teie teir teis teiu teor teos ter- terc tere teri tero terr ters teru tesc tese teso tess test tete teti teto tetr tets tett tetu teut tibi tibs tibu ticc tice tico tics tie- tiee tiei tieo tier ties tiet tiit tiiu tios tiou tirb tire tiri tiro tirr tirs tiru tisb tise tisi tiso tiss tist titc tite titi tito tits titt titu tobe tobi tobo tobs tobt tobu toce toci toco toee toei toer toes toet toie tois toit toor toos toot torc tore tori toro torr tors tort toru tosb tosc tose tosi toso toss tost tosu totc tote toti toto totr tots tott toui tour tous tout trcc tre- trec tree trei treo tres tret treu tri- trib tric trie trio tris trit troc troe troi troo tros trot trou trsi trst trtc trte trtr trub truc true trus trut truu tsbc tscc tsec tses tset tsis tsob tsoi tsos tsou tsse tssi tssr tsst tstc tsts tsui ttbb tteo tter ttoe ttss tttt tubb tube tubo tubr tubs tubu tucc tuco tuei tuer tues tuet tuis tuit tuiu tuor tuos turb turc ture turi turo turr turs turt turu tusc tusi tuss tust tute tuti tuto tuts tutt tutu tuuo u-ie ubbe ubbi ubbo uber ubet ubic ubii ubir ubis ubit uboc ubos ucbc ucci uces ucio ucos ucrc ucsb ucsc ucst ucsu ucut ueir uers uess uies uirr uise uist uits uocc uor- uore urbe urbi urbs urci ure- ures uret urib uric urie uris uriu uro- uroo urre urri urse ursi urso urss ursu urte urts urur urus urut usbc usbe usbr usbs uscc usce usco uscs usee user uses uset usie usis usoc usoe usoi usos ussb ussc usse ussr usss usst ussu ustb ustc uste usti usto usts usui usus utec uter utes utis utor utri utsc utti utto uttu uuoc uuri uusi uuuu