redti erdti rdeti dreti edrti derti retdi ertdi rtedi tredi etrdi terdi rdtei drtei rtdei trdei dtrei tdrei edtri detri etdri tedri dteri tderi redit erdit rdeit dreit edrit derit reidt eridt riedt iredt eirdt ierdt rdiet driet ridet irdet diret idret edirt deirt eidrt iedrt diert idert retid ertid rteid treid etrid terid reitd eritd rietd iretd eirtd iertd rtied tried rited irted tired itred etird teird eitrd ietrd tierd iterd rdtie drtie rtdie trdie dtrie tdrie rdite drite ridte irdte dirte idrte rtide tride ritde irtde tirde itrde dtire tdire ditre idtre tidre itdre edtir detir etdir tedir dteir tdeir editr deitr eidtr iedtr dietr idetr etidr teidr eitdr ietdr tiedr itedr dtier tdier diter idter tider itder
Note: these 'words' (valid or invalid) are all the permutations of the word redti. These words are obtained by scrambling the letters in redti.