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