-ous bbbb bbbs bbfc bbrc bcbc bcbs bccc bccs bcfc bcof bcor bcos bcrs bcru bcsc bcss bctc bcts bcuc bfcs bffs bfsr bfts bftt bobb bobo bobs bobu boco bocs bocu boff bofs bofu boob booc boof boor boos boot bor- borf boro borr bors bort boru bosc boso boss bost bosu botb boto bots bott bouf bour bous bout brcb brfc brfu brob broc broo bror bros brot brou brrr brrs brsb brsr brst brtc bruc brus brut bscs bsfc bsff bsfs bsos bssc bsts btcc btcs btfc btob btor btrc btrt btss bttb btus bubb bubo bubs bubu bucc buco bucs bucu bufc buff bufo bufr bur- burb buro burr burs burt buru busc buss bust busu but- buto buts butt buus c-bo cbbc cbbs cbcc cbcr cbcs cbct cbcu cbfb cbfc cbot cbrt cbsc cbtc cbtf cbus ccbc cccb cccc cccf cccs cccu ccfc ccff ccob ccoc ccrc ccrf ccrs ccrt ccsf ccss ccst cctb cctc cctt ccuc ccus ccut cfbc cfbr cfbs cfbt cfcb cfcf cfco cfcs cffb cffr cfor cfos cfrb cfrt cftc cftr cobb cobo cobs cobu coco coct cocu cofc coff cofs coft coob coof coos coot cor- corb corc corf coro corr cors cort cosc coso coss cost cotb cotc coto cots cott cotu coub cour cous cout crbc crbu crcc crcr crfc crfs crob croc croo cror crot crrt crss crst crtc crtf crts crub crus crut csbf cscb cscc cscf csco cscr cscs csfc csfr csob csor csos csot csrc csrs cssr cstc csto cstr csts csuf csur csus ctbs ctcf ctfc ctfo ctfs ctor ctos ctot ctrc ctrs ctsc ctss ctsu ctts cub- cubb cubs cucc cufc cuff cufo curb curf curo curr curs curt cusb cuso cuss cust cusu cut- cutc cuto cuts cutt fbrs fbus fcbs fccf fcot fcsc fcst fcto ffcc ffff ffrr ffss fftf fobs fobt foco focs fofo foof foos foot for- forb foro forr fors fort fosb foso foss fost foto fots fott four fous fout frbc frcc frfc frob fros frot frou frsb frsc frso frst frub fscb fscc fsfo fssc fssf ft-c ftfc ftos ftrs ftsr ftub ftuc fubb fubs fubu fuc- fuct fufc fuff fufu fuor fur- furo furr furs furt fusc fuso fuss fust fusu futo futs futu obbo obor obos obot obro obsr obss obst obts obus ocbc occc occt ocos ocro ocrr ocrs oct- octo octs ocur ofcr off- offc offo offr offs offu ofor ofst ofus oocr ooff oofs oooo ooos oort oost ootb oots oous orbb orbo orbs orbu orco orcs orff orfs orfu oro- orof oror oros orot orro orrs orso orsu ortc orto orts orub orus oscc osco osoo osor osos osro ossb osso ossu ostc ostr osts otbs otfc oto- otof otoo otor otos otro otrs otso otsu otto otts ottu otur otus oubs oucc oufc ouff our- ouro ours ourt oust out- outb outo outs ouu- rbbb rbbr rbbs rbss rbst rcbc rcbo rccb rccc rccs rcfc rcos rcsc rcss rctc rcts rffc rftc rob- robb robo robs robt robu rocc roco rocs rofc roff rofo roob roof roor roos root rorc roro rort roru rosc roso ross rost rotc roto rotr rots rott roub rouf rous rout rrfc rrrr rscc rscs rsfc rsos rsts rstu rtbf rtcc rtfb rtfc rtss rtts rubb rubs rubu ruct rufc ruff rufo ruft rurc ruro rurs ruru ruso russ rust rusu ruto ruts rutt rutu s-os sbbs sbcc sbcs sbct sbfc sbor sbot sbst sbtc sbus sccc sccs scct scfc scob scoo scor scot scr- scrc scrs scsc scso scsr scst scsu sctc scto sctr scts scub scur scut sfbc sfcc sfco sfcs sffc sfor sfos sfrc sfro sfss sfsu sfts sobo sobr sobs sobt sobu soco socr socs sofo soft soof soor soos soot sorb soro sorr sors sort soru soso soss sost sotc soto sots sotu souf sour sous sout srbc srcc srct srfc sros srtr srub ssbr sscc sscs ssfc ssoc ssot ssrc ssrs sssb sssc sssf ssss sstb sstc ssts stbc stbs stcc stcs stcu stfc stfu stob stof stoo stor stos stot stou strc stro strs stru stsf stss sttc sttr stub stuc stuf stur stus stut sub- subb subo subs suc- succ sucr sucs suf- sufc suff sufr sufs sufu suor suos sur- surc surf suro surr surs surt suru sus- suso suss sust susu suto sutu suus tbbs tbcb tbcc tbrb tbst tcbs tccc tccu tcfc tcos tctc tcts tfcu tfot tfrs tfss tftc tobo tobs tobt tobu toco toff tofo toft tofu toof toor toos toot torc torf toro torr tors tort toru tosb tosc toso toss tost tosu totc toto totr tots tott tour tous tout trcc trfc trfr troc troo tros trot trou trst trtc trtr trub truc trus trut truu tsbc tscc tsfc tsob tsos tsou tssf tssr tsst tstc tsts ttbb ttfc ttff ttss tttt tubb tubo tubr tubs tubu tucc tuco tufc tuff tufo tuft tufu tuor tuos turb turc turf turo turr turs turt turu tusc tuss tust tuto tuts tutt tutu tuuo ubbo uboc ubos ubtf ucbc ucfb ucos ucrc ucsb ucsc ucsf ucst ucsu ucut ufcu ufos uocc uofo uor- urbs urff urft uro- uroo urso urss ursu urts urur urus urut usbc usbr usbs uscc uscf usco uscs usfc usfs usoc usos ussb ussc ussf ussr usss usst ussu ustb ustc usto usts usus utfo utor utsc utto uttu uuoc uutf uuuu