kmdun mkdun kdmun dkmun mdkun dmkun kmudn mkudn kumdn ukmdn mukdn umkdn kdumn dkumn kudmn ukdmn dukmn udkmn mdukn dmukn mudkn umdkn dumkn udmkn kmdnu mkdnu kdmnu dkmnu mdknu dmknu kmndu mkndu knmdu nkmdu mnkdu nmkdu kdnmu dknmu kndmu nkdmu dnkmu ndkmu mdnku dmnku mndku nmdku dnmku ndmku kmund mkund kumnd ukmnd muknd umknd kmnud mknud knmud nkmud mnkud nmkud kunmd uknmd knumd nkumd unkmd nukmd munkd umnkd mnukd nmukd unmkd numkd kdunm dkunm kudnm ukdnm duknm udknm kdnum dknum kndum nkdum dnkum ndkum kundm ukndm knudm nkudm unkdm nukdm dunkm udnkm dnukm ndukm undkm nudkm mdunk dmunk mudnk umdnk dumnk udmnk mdnuk dmnuk mnduk nmduk dnmuk ndmuk mundk umndk mnudk nmudk unmdk numdk dunmk udnmk dnumk ndumk undmk nudmk
Note: these 'words' (valid or invalid) are all the permutations of the word kmdun. These words are obtained by scrambling the letters in kmdun.