akfun kafun afkun fakun kfaun fkaun akufn kaufn aukfn uakfn kuafn ukafn afukn faukn aufkn uafkn fuakn ufakn kfuan fkuan kufan ukfan fukan ufkan akfnu kafnu afknu faknu kfanu fkanu aknfu kanfu ankfu nakfu knafu nkafu afnku fanku anfku nafku fnaku nfaku kfnau fknau knfau nkfau fnkau nfkau akunf kaunf auknf uaknf kuanf ukanf aknuf kanuf ankuf nakuf knauf nkauf aunkf uankf anukf naukf unakf nuakf kunaf uknaf knuaf nkuaf unkaf nukaf afunk faunk aufnk uafnk fuank ufank afnuk fanuk anfuk nafuk fnauk nfauk aunfk uanfk anufk naufk unafk nuafk funak ufnak fnuak nfuak unfak nufak kfuna fkuna kufna ukfna fukna ufkna kfnua fknua knfua nkfua fnkua nfkua kunfa uknfa knufa nkufa unkfa nukfa funka ufnka fnuka nfuka unfka nufka
Note: these 'words' (valid or invalid) are all the permutations of the word akfun. These words are obtained by scrambling the letters in akfun.