-ous bbbb bbbs bbfn bffs bfsr bfts bftt bnor bnrr bnss bobb bobo bobs bobu boff bofs bofu bonn bono bons bont bonu boob boof boon boor boos boot bor- borf born boro borr bors bort boru bosn boso boss bost bosu botb botn boto bots bott bouf boun bour bous bout brfu brno brns brob bron broo bror bros brot brou brrr brrs brsb brsr brst brun brus brut bsff bsfs bsns bson bsos bsts btob btor btrt btss bttb btus bubb bubo bubs bubu buff bufo bufr bunb bunn buno buns bunt bunu buon bur- burb burn buro burr burs burt buru buss bust busu but- buto buts butt buus fbrs fbus ffff ffrr ffss fftf ffun fnrs fntb fnuf fobs fobt fofo fono fons font foof foon foos foot for- forb forn foro forr fors fort fosb foso foss fost foto fots fott foun four fous fout frns frob fron fros frot frou frsb frso frst frub frun fsfo fssf ftos ftrs ftsr ftub fubb fubs fubu fuff fufu funf funs funt fuor fur- furn furo furr furs furt fuso fuss fust fusu futo futs futu nbbo nbuf nfff nfon nfrs nfsr nfsu nfto nnnn nnos nnot nnss nntn nobo nobs nobu non- nonn nono nons nont nonu noo- noob noon nooo noor noos noot nor- norb norf norn noro norr nors nort nos- noss nost nosu not- noto nots nott noun nour nous nout nron nrts nsbo nsfs nsnr nsof nsos nsou nssb nssf nsso nssr nsss nsts nstu nsub ntfs ntnu ntof ntru ntsb ntsf ntss ntsu ntto nttr nubs nuff nunn nuno nuns nunt nuon nurn nurr nurs nurt nuru nuss nust nusu nuts nutt nutu obbo obon obor obos obot obro obsn obsr obss obst obts obus off- offo offr offs offu ofno ofor ofst ofus onno onon onor onos onso onst ont- onto onur onus onut ooff oofs oons oont oooo ooos oort oost ootb oots oous orbb orbo orbs orbu orff orfs orfu orno orns oro- orof oron oror oros orot orro orrs orso orsu orto orts orub orus osno osnr osoo osor osos osro ossb osso ossu ostr osts osun otbs oto- otof oton otoo otor otos otro otrs otso otsu otto otts ottu otur otus oubs ouff oun- our- ourn ouro ours ourt oust out- outb outo outs ouu- rbbb rbbr rbbs rbss rbst rnbr rnnt rnot rnut rob- robb robo robs robt robu roff rofo rono rons ront roob roof roon roor roos root roro rort roru roso ross rost rotn roto rotr rots rott roub rouf roun rous rout rrrr rrun rsnn rsno rsnr rsos rsts rstu rtbf rtfb rtns rtss rtts rubb rubs rubu ruff rufo ruft runf runn runo runs runt ruro rurs ruru ruso russ rust rusu ruto ruts rutt rutu ruun s-os sbbs sbor sbot sbst sbtn sbus sfnb sfnt sfor sfos sfro sfss sfsu sfts snfu snns snob snoo snor snos snot snrs sntr snub snur snus sobo sobr sobs sobt sobu sofo soft son- sono sons sont sonu soof soon soor soos soot sorb sorn soro sorr sors sort soru soso soss sost sotn soto sots sotu souf soun sour sous sout srnn srno sros srtr srub ssbn ssbr ssns ssot ssrs sssb sssf ssss sstb ssts stbs stfn stfu stnn stnr stns stob stof ston stoo stor stos stot stou strn stro strs stru stsf stss sttr stub stuf stun stur stus stut sub- subb subo subs suf- suff sufr sufs sufu sun- sunb sunn suno suns sunt sunu suor suos sur- surf surn suro surr surs surt suru sus- suso suss sust susu suto sutu suus tbbs tbnf tbrb tbst tfot tfrs tfss tnts tnut tobo tobs tobt tobu toff tofo toft tofu tonb tonn tono tons tonu toof toon toor toos toot torf torn toro torr tors tort toru tosb toso toss tost tosu toto totr tots tott toun tour tous tout trfr trno tron troo tros trot trou trst trtr trub trun trus trut truu tsob tsos tsou tssf tssr tsst tsts tsun ttbb ttff ttfn tton ttss tttt tubb tubo tubr tubs tubu tuff tufo tuft tufu tunb tunn tuno tuns tunu tuor tuos turb turf turn turo turr turs turt turu tuss tust tuto tuts tutt tutu tuuo ubbo ubon ubos ubtf ufos unno unns unon unos unrf unro unrs uns- unso unst untb unto unts unus unut uofo uor- urbs urff urft urns uro- uroo urso urss ursu urts urun urur urus urut usbr usbs usfs usno usnr usnu usos ussb ussf ussr usss usst ussu ustb usto usts usun usus utfo utor utto uttu uuno uutf uuuu