pxil xpil pixl ipxl xipl ixpl pxli xpli plxi lpxi xlpi lxpi pilx iplx plix lpix ilpx lipx xilp ixlp xlip lxip ilxp lixp
Note: these 'words' (valid or invalid) are all the permutations of the word pxil. These words are obtained by scrambling the letters in pxil.