ffff ffrr ffss fftf ffun flts fluf flur flus fnrs fnuf frns frst frun fsln fssf ft-l ftrs ftsr fuff fufu full fuls fulu funf funs funt fur- furl furn furr furs furt fuss fust fusu futs futu lfts llll lnfs lnts lrrr lrst lrts ls-r lssr lsts ltns ltnt ltrs ltsr lttr luff luft lufu lull lulu lunn luns lunt lurs lurt luss lust luts nfff nfrs nfsr nfsu nlls nnls nnnn nnsl nnss nntn nrrl nrtl nrts nsfs nslr nsls nsnr nsrl nssf nssr nsss nstl nsts nstu ntfl ntfs ntnu ntrl ntru ntsf ntss ntsu nttr nuff null nunn nuns nunt nurl nurn nurr nurs nurt nuru nusl nuss nust nusu nuts nutt nutu rffl rlls rnnt rnut rrrr rrun rsnn rsnr rssl rsts rstu rtls rtlt rtns rtss rtts ruff ruft rull runf runn runs runt rurs ruru russ rust rusu rutl ruts rutt rutu ruun sfls sfnt sfss sfsu sfts slft slln slrn slrs slst slsu slts slur slut snfu snlf snns snrs sntr snur snus srnn srtr ssfl sslt ssns ssrl ssrs sssf ssss sstl ssts stfn stfu stln stlt stnn stnr stns strn strs stru stsf stss sttr stuf stul stun stur stus stut suf- suff sufr sufs sufu sul- sulf sull sult sulu sun- sunn suns sunt sunu sur- surf surn surr surs surt suru sus- suss sust susu sutu suus tfrs tfss tlrs tnfl tnts tnut trfr trst trtr trun trus trut truu tsfl tssf tssr tsst tsts tsun ttff ttfn ttss tttt ttul tuff tuft tufu tull tulu tunn tuns tunu turf turn turr turs turt turu tuss tust tutl tuts tutt tutu ulft ullr ults ultt ulul ulus unlf unns unrf unrs uns- unst unts unus unut urff urft urls urns urss ursu urts urun urur urus urut usfl usfs uslu usnr usnu ussf ussr usss usst ussu usts usul usun usus utsl uttu uulu uutf uuuu