pixy ipxy pxiy xpiy ixpy xipy piyx ipyx pyix ypix iypx yipx pxyi xpyi pyxi ypxi xypi yxpi ixyp xiyp iyxp yixp xyip yxip
Note: these 'words' (valid or invalid) are all the permutations of the word pixy. These words are obtained by scrambling the letters in pixy.