tonef otnef tnoef ntoef ontef notef toenf otenf teonf etonf oetnf eotnf tneof nteof tenof etnof netof entof onetf noetf oentf eontf neotf enotf tonfe otnfe tnofe ntofe ontfe notfe tofne otfne tfone ftone oftne fotne tnfoe ntfoe tfnoe ftnoe nftoe fntoe onfte nofte ofnte fonte nfote fnote toefn otefn teofn etofn oetfn eotfn tofen otfen tfoen ftoen often foten tefon etfon tfeon fteon efton feton oeftn eoftn ofetn foetn efotn feotn tnefo ntefo tenfo etnfo netfo entfo tnfeo ntfeo tfneo ftneo nfteo fnteo tefno etfno tfeno fteno eftno fetno nefto enfto nfeto fneto efnto fento oneft noeft oenft eonft neoft enoft onfet nofet ofnet fonet nfoet fnoet oefnt eofnt ofent foent efont feont nefot enfot nfeot fneot efnot fenot
Note: these 'words' (valid or invalid) are all the permutations of the word tonef. These words are obtained by scrambling the letters in tonef.