-ous ffff ffps ffrr ffss fftf fofo foof foos foot fopp fops for- foro forr fors fort foso foss fost foto fotp fots fott foup four fous fout fprf frop fros frot frou frps frso frst fsfo fspf fssf fssp ftop ftos ftps ftrs ftsr fuff fufu fuor fur- furo furr furs furt fuso fuss fust fusu futo futs futu off- offo offr offs offu ofor ofst oftp ofus ooff oofs oooo ooos oops oort oost ootp oots oous opo- opor opos oppo opps opsu opto opts opus orff orfs orfu oro- orof oror oros orot orps orro orrs orso orsu orto orts orup orus osoo osor osos osro osso ossu ostr osts otfp oto- otof otoo otor otos otpp otro otrs otso otsu otto otts ottu otur otus ouff our- ouro ours ourt oust out- outo outs ouu- pfff pffr pfft pfps poff poof poop poor poos poot pop- popo popp pops popt poro porr pors port poso poss post potf poto pots pott potu pouf poup pour pous pout ppos pppo pppp ppps pprf ppru ppsf ppss ppts pptt ppur prfs pro- prof proo prop pros prot prou prps prrs prso prss prtp prtr pruf prus prut pruu psfs psos psou pspp pspr psps psrp psso psst psts pstu ptop ptrf puff puft pups pupu pur- puro purp purr purs puru puss pust put- puto puts putt putu roff rofo roof roop roor roos root ropo rops roro rort roru roso rosp ross rost roto rotr rots rott rouf roup rous rout rpof rpos rpps rpts rrrr rrsp rsos rspo rsps rstp rsts rstu rtps rtss rttp rtts ruff rufo ruft rupp rupt ruro rurp rurs ruru ruso russ rust rusu ruto ruts rutt rutu s-os sfor sfos sfro sfss sfsu sftp sfts sofo soft soof soop soor soos soot sopo sopp sops sopu soro sorr sors sort soru soso soss sost soto sotp sots sotu souf soup sour sous sout spfs spoo spop spor spos spot sppf spps spro sprs spso spsp spss spst spto sptr spts spur spus sput sros srps srpt srsp srtp srtr ssfp ssop ssot sspf sspo ssps sspt ssrs sssf ssss sstp ssts stfu stof stoo stop stor stos stot stou stpf stpp stps stro strs stru stsf stss sttr stuf stup stur stus stut suf- suff sufr sufs sufu suor suos sup- supo supp supr sups supt sur- surf suro surp surr surs surt suru sus- suso susp suss sust susu suto sutu suus tfot tfpt tfrs tfss tftp toff tofo toft tofu toof toor toos toot top- topf topo topp tops topt topu torf toro torp torr tors tort toru toso toss tost tosu toto totr tots tott toup tour tous tout tppp tppr tprs tptp tptr tput trfr troo trop tros trot trou trpp trps trst trtr trus trut truu tsop tsos tsou tspo tsps tspt tssf tssr tsst tsts tsup ttff ttop ttss tttt tuff tufo tuft tufu tuor tuos tupo tups tupu turf turo turp turr turs turt turu tuss tust tuto tuts tutt tutu tuuo u-rp ufos uftp uofo uor- upor upos uppp uppu upto upup urff urft uro- uroo urpo urso urss ursu urts urup urur urus urut usfs usos uspo uspp usps ussf ussr usss usst ussu usto ustp usts usus utfo utor utto uttu uutf uuuu