dhsh hdsh dshh sdhh hsdh shdh dhhs hdhs dhhs hdhs hhds hhds dshh sdhh dhsh hdsh shdh hsdh hshd shhd hhsd hhsd shhd hshd
Note: these 'words' (valid or invalid) are all the permutations of the word dhsh. These words are obtained by scrambling the letters in dhsh.