gtwi tgwi gwti wgti twgi wtgi gtiw tgiw gitw igtw tigw itgw gwit wgit giwt igwt wigt iwgt twig wtig tiwg itwg witg iwtg
Note: these 'words' (valid or invalid) are all the permutations of the word gtwi. These words are obtained by scrambling the letters in gtwi.