ffff ffii ffrr ffss fftf fiff fifi fift fiii fini finn fins fint firn firs fisi fiss fist fiti fits fitt fnrs frin fris frit frns frst fsfi fssf ftii ftrs ftsr ifis ifit ifni ifnr ifns ifrf ifri iftn iiii iiis iiit iirs iisi iisr iist iitr iitt infi infs inis init inni innr inns inri inrs inss inst inti intn intr ints iri- irin iris irri irrs irsf irtf irti irts isin isis isit isnt isri issf issi issr isss isti istr ists itif itin itis itrf itri itrs itsf itsi ittf n-ii nfff nfrs nfsr niff nift niir niit nini nins nirs nirt nisi niss nist nitf niti nitr nits nnit nnnn nnss nntn nrts nsfs nsin nsis nsnr nssf nssr nsss nsts ntfs ntis ntsf ntss nttr riff rifs rift riif riin riis rinf rinn riri rirs risi riss rist riti rits ritt rnin rnnt rrif rrrr rsis rsnn rsnr rsts rtns rtss rtts s-ii sfnt sfss sfts siff sifr sift siit sini sinn sins sint sirf siri sirr sirs sirt sisi siss sist sit- siti sitn sits sitt snir snit snns snrs sntr srfi sris srni srnn srtr ssin ssis ssit ssns ssri ssrs sssf sssi ssss ssts stfn stif stir stis stit stnn stnr stns stri strn strs stsf stsi stss sttr tfin tfrs tfsi tfss tiff tift tiit tini tinn tins tint tiri tirr tirs tisi tiss tist titi tits titt tnts trfr tri- trif trin tris trit trsi trst trtr tsin tsis tssf tssi tssr tsst tsts ttff ttfn ttss tttt