ofax foax oafx aofx faox afox ofxa foxa oxfa xofa fxoa xfoa oaxf aoxf oxaf xoaf axof xaof faxo afxo fxao xfao axfo xafo
Note: these 'words' (valid or invalid) are all the permutations of the word ofax. These words are obtained by scrambling the letters in ofax.