-ous ffff ffps ffss floo flop flos flou fluf fluo flus fofo foll folo fols foof fool foos fopp fops foso foss foul foup fous fsfo fspf fssf fssp fuff fufu full fuls fulu fuso fuss fusu llll lloo llps loff loll lolo lols loof lool loop loos lopp lops lopu loso losp loss loul loup lous louu lpfp lppl lpss lsof lspl lsso lssp luff lufu lull lulu lupo lupu luso luss luup off- offo offs offu ofus olfs ollo olof olos ooff oofs oolo oooo ooos oops oous opls opo- opos oppo opps opsu opus oslo osoo osos osso ossu osul ouff ouls oulu ouu- pfff pfps plff ploo plop plos plou plpp plss plup plus poff poll polo pols polu poof pool poop poos pop- popo popp pops poso poss pouf poul poup pous pplo ppos pppo pppp ppps ppsf ppss psfs psol psos psou pspp psps psso puff pull pulo pulp puls pulu pupl pups pupu puss s-os sfls sfos sfss sfsu sllp sloo slop slos slpp slps slsu slup sofo solf soll solo solp sols soof sool soop soos sopo sopp sops sopu soso soss souf soul soup sous spfs splo splp spls spoo spop spos sppf spps spso spsp spss spus ssfl ssfp sslp ssop sspf sspl sspo ssps sssf ssss suf- suff sufs sufu sul- sulf sull sulo sulp sulu suos sup- supo supp sups sus- suso susp suss susu suus ufos ullo ulo- ulos ulul ulus uofl uofo uplo upos uppp uppu upup usfl usfs uslp uslu usos uspo uspp usps ussf usss ussu usul usus uulu uuuu