hadsl ahdsl hdasl dhasl adhsl dahsl hasdl ahsdl hsadl shadl ashdl sahdl hdsal dhsal hsdal shdal dshal sdhal adshl dashl asdhl sadhl dsahl sdahl hadls ahdls hdals dhals adhls dahls halds ahlds hlads lhads alhds lahds hdlas dhlas hldas lhdas dlhas ldhas adlhs dalhs aldhs ladhs dlahs ldahs hasld ahsld hsald shald ashld sahld halsd ahlsd hlasd lhasd alhsd lahsd hslad shlad hlsad lhsad slhad lshad aslhd salhd alshd lashd slahd lsahd hdsla dhsla hsdla shdla dshla sdhla hdlsa dhlsa hldsa lhdsa dlhsa ldhsa hslda shlda hlsda lhsda slhda lshda dslha sdlha dlsha ldsha sldha lsdha adslh daslh asdlh sadlh dsalh sdalh adlsh dalsh aldsh ladsh dlash ldash asldh saldh alsdh lasdh sladh lsadh dslah sdlah dlsah ldsah sldah lsdah
Note: these 'words' (valid or invalid) are all the permutations of the word hadsl. These words are obtained by scrambling the letters in hadsl.