-ing ffff ffii ffss fftf fgts fiff fifi fift figg figs fiii fing fini finn fins fint fisi fiss fist fiti fits fitt fsfi fsgs fssf ftii ggfg gggg ggss giff gifs gift gigg gigi gign gigs giis ging gini ginn gins giss gist gits gnin gnit gnti gsif gsis ifis ifit ifni ifns iftn iggs igis igni igns iiii iiis iiit iisi iist iitt infi infs ings inig inis init inni inns inss inst intg inti intn ints isin isis isit isnt issf issi isss isti ists itgs itif itin itis itsf itsi ittf n-ii nfff ngfs ngns ngsn ngtn ngts niff nift nigg nigs nigt niit ning nini nins nisi niss nist nitf niti nits nngn nnit nnnn nnss nntn nsfs nsin nsis nssf nsss nsts ntfs ntis ntsf ntss s-ii sfnt sfss sfts sggg sggs sgss sgts siff sift sigg sigi sign sigs siit sing sini sinn sins sint sisi siss sist sit- siti sitn sits sitt snig snit snns ssgs ssgt ssin ssis ssit ssns sssf sssi ssss ssts stfn stif stig stis stit stng stnn stns stsf stsi stss tfin tfsi tfss tgif tgts tiff tift tigi tigs tiit ting tini tinn tins tint tisi tiss tist titi tits titt tngs tnts tsgt tsig tsin tsis tssf tssg tssi tsst tsts ttff ttfn ttss tttt