nifty infty nfity fnity ifnty finty nitfy intfy ntify tnify itnfy tinfy nftiy fntiy ntfiy tnfiy ftniy tfniy iftny fitny itfny tifny ftiny tfiny nifyt infyt nfiyt fniyt ifnyt finyt niyft inyft nyift ynift iynft yinft nfyit fnyit nyfit ynfit fynit yfnit ifynt fiynt iyfnt yifnt fyint yfint nityf intyf ntiyf tniyf itnyf tinyf niytf inytf nyitf ynitf iyntf yintf ntyif tnyif nytif yntif tynif ytnif itynf tiynf iytnf yitnf tyinf ytinf nftyi fntyi ntfyi tnfyi ftnyi tfnyi nfyti fnyti nyfti ynfti fynti yfnti ntyfi tnyfi nytfi yntfi tynfi ytnfi ftyni tfyni fytni yftni tyfni ytfni iftyn fityn itfyn tifyn ftiyn tfiyn ifytn fiytn iyftn yiftn fyitn yfitn ityfn tiyfn iytfn yitfn tyifn ytifn ftyin tfyin fytin yftin tyfin ytfin
Note: these 'words' (valid or invalid) are all the permutations of the word nifty. These words are obtained by scrambling the letters in nifty.