ffff ffss fftf ffun fnuf fssf ftfy fuff fufu funf funs funt fuss fust fusu futs futu fuyt fuyu fynn fynt nfff nfsu nnnn nnss nntn nsfs nssf nsss nsts nstu ntfs ntfy ntnu ntsf ntss ntsu nuff nunn nuns nunt nuny nuss nust nusu nusy nuts nutt nutu nuys nynt nyny nysf nyss nyst sfnt sfss sfsu sfts snfu snns snsy snus snys ssns sssf ssss ssts stfn stfu stnn stns stsf stss stuf stun stus stut stuy styf stys suf- suff sufs sufu sun- sunn suns sunt sunu suny sus- suss sust susu susy sutu suty suus suyn suyu syff syfy syn- syns synu syny syss syst sytt syun tfss tnts tnut tssf tsst tsts tsun tsys ttff ttfn ttss tttt ttys tuff tuft tufu tunn tuns tunu tuny tuss tust tuts tutt tutu tuty tuyn tuys tyff tyft tynt tyny tyss tyst tytt tyty tyus tyyn unns uns- unst unts unty unus unut usfs usnu ussf usss usst ussu ussy usts usun usus uttu uutf uuuu uuyn uyts yssu yuff yuft yufu yuns yuny yust yutu yuty yuyu yyff yyyy