fauna afuna fuana ufana aufna uafna fanua afnua fnaua nfaua anfua nafua funaa ufnaa fnuaa nfuaa unfaa nufaa aunfa uanfa anufa naufa unafa nuafa fauan afuan fuaan ufaan aufan uafan faaun afaun faaun afaun aafun aafun fuaan ufaan fauan afuan uafan aufan auafn uaafn aaufn aaufn uaafn auafn fanau afnau fnaau nfaau anfau nafau faanu afanu faanu afanu aafnu aafnu fnaau nfaau fanau afnau nafau anfau anafu naafu aanfu aanfu naafu anafu funaa ufnaa fnuaa nfuaa unfaa nufaa fuana ufana fauna afuna uafna aufna fnaua nfaua fanua afnua nafua anfua unafa nuafa uanfa aunfa naufa anufa aunaf uanaf anuaf nauaf unaaf nuaaf auanf uaanf aaunf aaunf uaanf auanf anauf naauf aanuf aanuf naauf anauf unaaf nuaaf uanaf aunaf nauaf anuaf
Note: these 'words' (valid or invalid) are all the permutations of the word fauna. These words are obtained by scrambling the letters in fauna.