dirke idrke drike rdike irdke ridke dikre idkre dkire kdire ikdre kidre drkie rdkie dkrie kdrie rkdie krdie irkde rikde ikrde kirde rkide kride direk idrek driek rdiek irdek ridek dierk iderk deirk edirk iedrk eidrk dreik rdeik derik edrik redik erdik iredk riedk ierdk eirdk reidk eridk diker idker dkier kdier ikder kider diekr idekr deikr edikr iedkr eidkr dkeir kdeir dekir edkir kedir ekdir ikedr kiedr iekdr eikdr keidr ekidr drkei rdkei dkrei kdrei rkdei krdei dreki rdeki derki edrki redki erdki dkeri kderi dekri edkri kedri ekdri rkedi kredi rekdi erkdi kerdi ekrdi irked riked ikred kired rkied kried irekd riekd ierkd eirkd reikd erikd ikerd kierd iekrd eikrd keird ekird rkeid kreid rekid erkid kerid ekrid
Note: these 'words' (valid or invalid) are all the permutations of the word dirke. These words are obtained by scrambling the letters in dirke.