ffff ffii ffrr ffss fftf fiff fifi fift fiii fiji firs firy fisi fiss fist fisu fiti fits fitt fris frit frst frys fsfi fssf ftfy ftii ftrs ftsj ftsr fuff fufu fuir fuit fuji fur- furi furr furs furt fury fusi fuss fust fusu futi futs futu fuyt fuyu fyfi fyrs fyry fyti iffy ifis ifit ifrf ifri iiii iiis iiit iirs iisi iisj iisr iist iisu iitr iitt ijji ijui irfu iri- iris iriy irri irrs irsf irtf irti irts irus isfj isis isit isri issf issi issr isss issu issy isti istj istr ists isty isus isys itif itis itrf itri itrs itry itsf itsi itsu itsy ittf itty itur iuiu iuss iust iuty jffs jftr jiff jiji jiju jiri jirt jiru jist jiti jits jitu jsft jssr jsss juif juis juju juri jurr jurs jury jusi juss just juti juts juys jyst riff rifs rift rifu riif riis rijf riji rijs riri rirs risi riss rist risu riti rits ritt ritu rius riyf rrif rrrr rsis rsts rstu rtss rtts ruff ruft ruif ruis ruit ruri rurs ruru rusi russ rust rusu rusy ruti ruts rutt rutu ruty ruyi ruys ryff ryft ryif ryis rysy rytt ryyf ryyt s-ii sfij sfss sfsu sfts siff sifr sift sifu sify siit sijt sirf siri sirr sirs sirt siru sisi siss sist sisu sisy sit- siti sits sitt situ sity siui sius siut siyi siyu sjis sjrt sjsu sjur srfi sris srtr ssis ssit ssri ssrs sssf sssi ssss ssts stfu stif stir stis stit stri strs stru stry stsf stsi stss sttr stuf stur stus stut stuy styf styr stys suf- suff sufi sufr sufs sufu suir suis suit suji sur- surf suri surr surs surt suru sury sus- susi suss sust susu susy suti sutu suty suus suyi suyr suyu syff syfy syis syrs syrt syry syss syst sytt tfrs tfsi tfss tiff tift tiit tiiu tiji tijs tiri tirr tirs tiru tiry tisi tiss tist titi tits titt titu tiyi tjsj trfr tri- trif tris trit trsi trst trtr trus trut truu try- trys tsis tssf tssi tssr tsst tsts tsui tsys ttff ttss tttt ttys tuff tufi tuft tufu tuis tuit tuiu turf turi turr turs turt turu tury tusi tuss tust tuti tuts tutt tutu tuty tuys tyff tyft tyir tyr- tyrf tyrr tyss tyst tyti tytt tyty tyus uirr uist uits urff urfi urft urif uris uriu urri urry ursi urss ursu ursy urts urur urus urut usfi usfs usif usis ussf ussr usss usst ussu ussy usti usts usui usus utis utri utti uttu uuri uusi uutf uuuu uyir uyts yiff yift yiji yijs yirr yiss yist yiti ysii yssu yuff yuft yufu yuit yuji yuju yuri yurt yury yust yutu yuty yuyu yyff yyyy