wreck rweck werck ewrck rewck erwck wrcek rwcek wcrek cwrek rcwek crwek wecrk ewcrk wcerk cwerk ecwrk cewrk recwk ercwk rcewk crewk ecrwk cerwk wrekc rwekc werkc ewrkc rewkc erwkc wrkec rwkec wkrec kwrec rkwec krwec wekrc ewkrc wkerc kwerc ekwrc kewrc rekwc erkwc rkewc krewc ekrwc kerwc wrcke rwcke wcrke cwrke rcwke crwke wrkce rwkce wkrce kwrce rkwce krwce wckre cwkre wkcre kwcre ckwre kcwre rckwe crkwe rkcwe krcwe ckrwe kcrwe weckr ewckr wcekr cwekr ecwkr cewkr wekcr ewkcr wkecr kwecr ekwcr kewcr wcker cwker wkcer kwcer ckwer kcwer eckwr cekwr ekcwr kecwr ckewr kcewr reckw erckw rcekw crekw ecrkw cerkw rekcw erkcw rkecw krecw ekrcw kercw rckew crkew rkcew krcew ckrew kcrew eckrw cekrw ekcrw kecrw ckerw kcerw
Note: these 'words' (valid or invalid) are all the permutations of the word wreck. These words are obtained by scrambling the letters in wreck.