otto otts ottu otur otus oubs oucc ouer oule ouls oulu our- oure ouro ours ourt ouse oust out- outb oute outo outs ouu- rbbb rbbr rbbs rbcl rble rbsl rbss rbst rcbc rcbo rccb rccc rccs rcet rcle rcls rcos rcsc rcsl rcss rctc rcts rebb rebe rebo rebs rebu recc rece recr recs rect recu reeb reel rees reet relb rele rell relo rels relt reol reos reot reou rere rero rers rert reru rese reso ress rest rete reto retr rets rett reue reul reus reut reuu rlcs rlee rleu rlls rob- robb robe robo robs robt robu rocc roce roco rocs roel roer roes roet role roll rolo rolt roob rool roor roos root rorc rore roro rort roru rosc rose roso ross rost rotc rote rotl roto rotr rots rott roub roue roul rous rout rrle rrrr rscc rscs rsee rslc rsos rsre rssl rsts rstu rtcc rtce rtee rtes rtle rtls rtlt rtss rtts rubb rube rubs rubu ruce ruct ruel ruer rues ruet rule rull rulo rurc rure ruro rurs ruru ruse ruso russ rust rusu rute rutl ruto ruts rutt rutu s-os sbbs sbcc sbcs sbct sber sbor sbot sbse sbst sbtc sbus sccc scce sccl sccs scct scec scee scel scer scet scl- sclc scls scob scol scoo scor scot scr- scrc scre scrs scsc scsl scso scsr scst scsu sctc sctl scto sctr scts scub scul scur scut se-c se-e se-o se-s se-t se-u sebe sebo sebs sebt sec- secc sece seco secr secs sect secu seeb seec seel seer sees seet seeu selb sele sell selo sels selt selu seoc seol serb serc sere sero serr sers sert seru sesc sese seso sess sest set- setc sete setl seto sets sett seul seur slcc slcu sleb slee sler sles slet slob sloc sloe sloo slos slot slrc slre slrs slsc slst slsu slts slub sluc slue slur slut sobe sobo sobr sobs sobt sobu soce socl soco socr socs soec soel soeo soes sole soll solo solr sols solt sool soor soos soot sorb sore soro sorr sors sort soru sose soso soss sost sotc sote sotl soto sots sotu soue soul sour sous sout srbc srcc srct sreb srec sreo sres sros srtr srub ssbr sscc ssce sscs ssec ssee sses sset sslc ssle sslt ssoc ssot ssrc ssrl ssrs sssb sssc ssss sstb sstc sstl ssts stbc stbs stcc stcs stcu stec stee stel steo ster stes stet stlc stle stlo stlt stob stoe stol stoo stor stos stot stou strc stre stro strs stru stss sttc sttr stub stuc stue stul stur stus stut sub- subb subl subo subs suc- succ sucr sucs suee suel suer sues suet sueu sul- sulc sule sull sulo sult sulu suor suos sur- surc sure suro surr surs surt suru sus- suse suso suss sust susu sute suto sutu suus tbbs tbcb tbcc tbce tbrb tbst tcbs tccc tccu tcos tctc tcts tcul tebo tebu tecl teco tecr tecs tect teec teel teer tees teet tel- telc tele tell telo tels telt telu teor teos ter- terc tere tero terr ters teru tesc tese tesl teso tess test tete teto tetr tets tett tetu teut tlco tlos tlrs tobe tobo tobs tobt tobu toce toco toee toer toes toet tol- tole toll tolo tolt tolu tool toor toos toot torc tore toro torr tors tort toru tosb tosc tose toso toss tost tosu totc tote toto totr tots tott toul tour tous tout trcc trcl tre- trec tree treo tres tret treu troc troe troo tros trot trou trst trtc trte trtr trub truc true trus trut truu tsbc tscc tsec tses tset tsob tsol tsos tsou tsse tssr tsst tstc tsts ttbb tteo tter ttoe ttss tttt ttul tubb tube tubo tubr tubs tubu tucc tuco tuel tuer tues tuet tule tull tulo tulu tuor tuos turb turc ture turo turr turs turt turu tusc tuss tust tute tutl tuto tuts tutt tutu tuuo ubbe ubbo uber ubet uble ublo ubls uboc ubos ucbc ucel uces ucos ucrc ucsb ucsc ucst ucsu ucut uele uell uers uess ulbc ulcc ulco uleb ulee uleo ules ulle ullo ullr ulo- uloc ulos ulto ults ultt ulul ulus uocc uolc uor- uore urbe urbs ure- ures uret urle urls uro- urol uroo urre urse urso urss ursu urte urts urur urus urut usbc usbe usbl usbr usbs uscc usce usco uscs usee usel user uses uset usle uslu usoc usoe usos ussb ussc usse ussr usss usst ussu ustb ustc uste usto usts usul usus utec utel uter utes utor utsc utsl utto uttu uulu uuoc uuuu