-ous ffff ffrr ffss fftf ffun fnrs fnuf fofo fono fons font foof foon foos foot for- forn foro forr fors fort foso foss fost foto fots fott foun four fous fout frns fron fros frot frou frso frst frun fsfo fssf ftos ftrs ftsr fuff fufu funf funs funt fuor fur- furn furo furr furs furt fuso fuss fust fusu futo futs futu nfff nfon nfrs nfsr nfsu nfto nnnn nnos nnot nnss nntn non- nonn nono nons nont nonu noo- noon nooo noor noos noot nor- norf norn noro norr nors nort nos- noss nost nosu not- noto nots nott noun nour nous nout nron nrts nsfs nsnr nsof nsos nsou nssf nsso nssr nsss nsts nstu ntfs ntnu ntof ntru ntsf ntss ntsu ntto nttr nuff nunn nuno nuns nunt nuon nurn nurr nurs nurt nuru nuss nust nusu nuts nutt nutu 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 oots oous orff orfs orfu orno orns oro- orof oron oror oros orot orro orrs orso orsu orto orts orus osno osnr osoo osor osos osro osso ossu ostr osts osun oto- otof oton otoo otor otos otro otrs otso otsu otto otts ottu otur otus ouff oun- our- ourn ouro ours ourt oust out- outo outs ouu- rnnt rnot rnut roff rofo rono rons ront roof roon roor roos root roro rort roru roso ross rost rotn roto rotr rots rott rouf roun rous rout rrrr rrun rsnn rsno rsnr rsos rsts rstu rtns rtss rtts ruff rufo ruft runf runn runo runs runt ruro rurs ruru ruso russ rust rusu ruto ruts rutt rutu ruun s-os sfnt sfor sfos sfro sfss sfsu sfts snfu snns snoo snor snos snot snrs sntr snur snus sofo soft son- sono sons sont sonu soof soon soor soos soot sorn soro sorr sors sort soru soso soss sost sotn soto sots sotu souf soun sour sous sout srnn srno sros srtr ssns ssot ssrs sssf ssss ssts stfn stfu stnn stnr stns stof ston stoo stor stos stot stou strn stro strs stru stsf stss sttr stuf stun stur stus stut suf- suff sufr sufs sufu sun- sunn suno suns sunt sunu suor suos sur- surf surn suro surr surs surt suru sus- suso suss sust susu suto sutu suus tfot tfrs tfss tnts tnut toff tofo toft tofu tonn tono tons tonu toof toon toor toos toot torf torn toro torr tors tort toru toso toss tost tosu toto totr tots tott toun tour tous tout trfr trno tron troo tros trot trou trst trtr trun trus trut truu tsos tsou tssf tssr tsst tsts tsun ttff ttfn tton ttss tttt tuff tufo tuft tufu tunn tuno tuns tunu tuor tuos turf turn turo turr turs turt turu tuss tust tuto tuts tutt tutu tuuo ufos unno unns unon unos unrf unro unrs uns- unso unst unto unts unus unut uofo uor- urff urft urns uro- uroo urso urss ursu urts urun urur urus urut usfs usno usnr usnu usos ussf ussr usss usst ussu usto usts usun usus utfo utor utto uttu uuno uutf uuuu