-ous ffff ffps ffrr ffss fftf floo flop flor flos flot flou flts fluf fluo flur flus fofo foll folo folr fols folt foof fool foos foot fopp fops for- forl foro forr fors fort foso foss fost foto fotp fots fott foul foup four fous fout fprf frol frop fros frot frou frps frso frst fsfo fspf fssf fssp ft-l ftop ftos ftps ftrs ftsr fuff fufu full fuls fulu fuor fur- furl furo furr furs furt fuso fuss fust fusu futo futs futu lftp lfts llll lloo llps loff loft loll lolo lols loof lool loop loor loos loot lopp lops lopu loro lors loso losp loss lost lotl loto lotr lots lott loul loup lour lous lout louu lpfp lpft lppl lprp lpss lrps lrpu lrrr lrst lrts ls-r lsof lspl lspr lsso lssp lssr lsts ltps ltrs ltsp ltsr lttr luff luft lufu lull lulu lupo lupu lurs lurt luso luss lust luts luup off- offo offr offs offu ofor ofst oftp ofus olfs ollo olof olor olos olot olst oltu olur ooff oofs oolo oooo ooos oops oort oost ootp oots oous opls opo- opor opos oppo opps opsu opto opts opus orff orfs orfu orlo orlu oro- orof oror oros orot orps orro orrs orso orsu orto orts orup orus oslo osoo osor osos osro osso ossu ostr osts osul otfp oto- otof otoo otor otos otpp otro otrs otso otsu otto otts ottu otur otus ouff ouls oulu our- ouro ours ourt oust out- outo outs ouu- pfff pffr pfft pfps plff ploo plop plos plot plou plpp plss pltf pltt plup plur plus poff poll polo pols polt polu poof pool poop poor poos poot pop- popo popp pops popt poro porr pors port poso poss post potf poto pots pott potu pouf poul poup pour pous pout pplo ppos pppo pppp ppps pprf ppru ppsf ppss ppts pptt ppur prfs prlr prls pro- prof prol proo prop pros prot prou prps prrs prsl prso prss prtp prtr pruf prus prut pruu psfs psol psos psou pspp pspr psps psrp psso psst psts pstu ptol ptop ptrf puff puft pull pulo pulp puls pult pulu pupl pups pupu pur- purl puro purp purr purs puru puss pust put- puto puts putt putu rffl rlls roff rofl rofo rolf roll rolo rolp rolt roof rool roop roor roos root ropo rops roro rort roru roso rosp ross rost rotl roto rotr rots rott rouf roul roup rous rout rpls rpof rpos rpps rpts rrrr rrsp rslp rsos rspo rsps rssl rstp rsts rstu rtls rtlt rtps rtss rttp rtts ruff rufo ruft rull rulo rupp rupt ruro rurp rurs ruru ruso russ rust rusu rutl ruto ruts rutt rutu s-os sfls sfor sfos sfro sfss sfsu sftp sfts slft sllp sloo slop slos slot slpp slps slrp slrs slst slsu slts slup slur slut sofo soft solf soll solo solp solr sols solt soof sool soop soor soos soot sopo sopp sops sopu soro sorr sors sort soru soso soss sost sotl soto sotp sots sotu souf soul soup sour sous sout spfs splo splp splr spls 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 ssfl ssfp sslp sslt ssop ssot sspf sspl sspo ssps sspt ssrl ssrs sssf ssss sstl sstp ssts stfu stlo stlt stof stol stoo stop stor stos stot stou stpf stpp stps stro strs stru stsf stss sttr stuf stul stup stur stus stut suf- suff sufr sufs sufu sul- sulf sull sulo sulp sult sulu 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 tlos tlrs toff tofo toft tofu tol- toll tolo tolt tolu toof tool 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 toul toup tour tous tout tpls tpol tppp tppr tprs tptp tptr tput trfr troo trop tros trot trou trpp trps trst trtr trus trut truu tsfl tsol tsop tsos tsou tspo tsps tspt tssf tssr tsst tsts tsup ttff ttop ttss tttt ttul tuff tufo tuft tufu tull tulo tulp tulu tuor tuos tupo tups tupu turf turo turp turr turs turt turu tuss tust tutl tuto tuts tutt tutu tuuo u-rp ufos uftp ulft ullo ullr ulo- ulos ulto ults ultt ulul ulus uofl uofo uor- uplo upor upos uppp uppu uptl upto upup urff urft urls uro- urol uroo urpo urso urss ursu urts urup urur urus urut usfl usfs uslp uslu usos uspo uspp usps ussf ussr usss usst ussu usto ustp usts usul usus utfo utor utsl utto uttu uulu uutf uuuu