ogyx goyx oygx yogx gyox ygox ogxy goxy oxgy xogy gxoy xgoy oyxg yoxg oxyg xoyg yxog xyog gyxo ygxo gxyo xgyo yxgo xygo
Note: these 'words' (valid or invalid) are all the permutations of the word ogyx. These words are obtained by scrambling the letters in ogyx.