alack laack aalck aalck laack alack alcak lacak aclak calak lcaak claak aaclk aaclk acalk caalk acalk caalk lacak alcak lcaak claak aclak calak alakc laakc aalkc aalkc laakc alakc alkac lakac aklac kalac lkaac klaac aaklc aaklc akalc kaalc akalc kaalc lakac alkac lkaac klaac aklac kalac alcka lacka aclka calka lcaka claka alkca lakca aklca kalca lkaca klaca ackla cakla akcla kacla ckala kcala lckaa clkaa lkcaa klcaa cklaa kclaa aackl aackl acakl caakl acakl caakl aakcl aakcl akacl kaacl akacl kaacl ackal cakal akcal kacal ckaal kcaal ackal cakal akcal kacal ckaal kcaal lacka alcka lcaka claka aclka calka lakca alkca lkaca klaca aklca kalca lckaa clkaa lkcaa klcaa cklaa kclaa ackla cakla akcla kacla ckala kcala
Note: these 'words' (valid or invalid) are all the permutations of the word alack. These words are obtained by scrambling the letters in alack.