kwax wkax kawx akwx wakx awkx kwxa wkxa kxwa xkwa wxka xwka kaxw akxw kxaw xkaw axkw xakw waxk awxk wxak xwak axwk xawk
Note: these 'words' (valid or invalid) are all the permutations of the word kwax. These words are obtained by scrambling the letters in kwax.