zyga yzga zgya gzya ygza gyza zyag yzag zayg azyg yazg ayzg zgay gzay zagy azgy gazy agzy ygaz gyaz yagz aygz gayz agyz
Note: these 'words' (valid or invalid) are all the permutations of the word zyga. These words are obtained by scrambling the letters in zyga.