ffff ffii ffrr ffss fftf fgts fiff fifi fift figg figs fiii firs fisi fiss fist fisu fiti fits fitt frig fris frit frst frug fsfi fsgs fssf ftii ftrs ftsr fuff fufu fugi fugs fugu fuig fuir fuit fur- furg furi furr furs furt fusi fuss fust fusu futi futs futu ggfg gggg ggss giff gifs gift gifu gigg gigi gigs giis girg giri girr girs girt giru giss gist gits giur gius grif grig gris grit grrr grrs grss gruf grug grui grur grus grut gsif gsis gstr gsur guff gugg gugi gugu guis gurg guri gurr gurs gurt guru guss gust guti guts gutt gutu guus ifis ifit ifrf ifri iggs igis igri igus iiii iiis iiit iirs iisi iisr iist iisu iitr iitt irfu irgs iri- irig iris irri irrs irsf irsg irtf irti irts irus isis isit isrg isri issf issi issr isss issu isti istr ists isus itgs itif itis itrf itri itrs itsf itsi itsu ittf itur iugs iuiu iuss iust rfgs rgit rgtr rgts riff rifs rift rifu rigg rigi rigs rigu riif riis riri rirs risi riss rist risu riti rits ritt ritu rius rrif rrrr rsis rsts rstu rtgs rtss rtts ruff ruft rugg rugi rugs ruif ruis ruit ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu s-ii sfss sfsu sfts sggg sggs sgss sgts siff sifr sift sifu sigg sigi sigs siit sirf siri sirr sirs sirt siru sisi siss sist sisu sit- siti sits sitt situ siui sius siut srfi sris srtr ssgs ssgt ssis ssit ssrg ssri ssrs sssf sssi ssss ssts stfu stgr stif stig stir stis stit stri strs stru stsf stsi stss sttr stuf stug stur stus stut suf- suff sufi sufr sufs sufu sug- sugg sugi suig suir suis suit sur- surf surg suri surr surs surt suru sus- susi suss sust susu suti sutu suus tfrs tfsi tfss tgif tgts tiff tift tigi tigr tigs tiit tiiu tiri tirr tirs tiru tisi tiss tist titi tits titt titu trfr tri- trif trig tris trit trsi trst trtr trug trus trut truu tsgt tsig tsis tssf tssg tssi tssr tsst tsts tsui ttff ttss tttt tuff tufi tuft tufu tugg tugs tugu tuig tuis tuit tuiu turf turg turi turr turs turt turu tusi tuss tust tuti tuts tutt tutu uggs uggt ugis ugri ugur uguu uirr uist uits urff urfi urft urgi urgu urif uris uriu urri ursi urss ursu urts urur urus urut usfi usfs usif usis ussf ussr usss usst ussu usti usts usui usus utis utri utti uttu utug uuri uusi uutf uuuu