dreck rdeck derck edrck redck erdck drcek rdcek dcrek cdrek rcdek crdek decrk edcrk dcerk cderk ecdrk cedrk recdk ercdk rcedk credk ecrdk cerdk drekc rdekc derkc edrkc redkc erdkc drkec rdkec dkrec kdrec rkdec krdec dekrc edkrc dkerc kderc ekdrc kedrc rekdc erkdc rkedc kredc ekrdc kerdc drcke rdcke dcrke cdrke rcdke crdke drkce rdkce dkrce kdrce rkdce krdce dckre cdkre dkcre kdcre ckdre kcdre rckde crkde rkcde krcde ckrde kcrde deckr edckr dcekr cdekr ecdkr cedkr dekcr edkcr dkecr kdecr ekdcr kedcr dcker cdker dkcer kdcer ckder kcder eckdr cekdr ekcdr kecdr ckedr kcedr reckd erckd rcekd crekd ecrkd cerkd rekcd erkcd rkecd krecd ekrcd kercd rcked crked rkced krced ckred kcred eckrd cekrd ekcrd kecrd ckerd kcerd
Note: these 'words' (valid or invalid) are all the permutations of the word dreck. These words are obtained by scrambling the letters in dreck.