sayid asyid syaid ysaid aysid yasid saiyd asiyd siayd isayd aisyd iasyd syiad ysiad siyad isyad yisad iysad ayisd yaisd aiysd iaysd yiasd iyasd saydi asydi syadi ysadi aysdi yasdi sadyi asdyi sdayi dsayi adsyi dasyi sydai ysdai sdyai dsyai ydsai dysai aydsi yadsi adysi daysi ydasi dyasi saidy asidy siady isady aisdy iasdy sadiy asdiy sdaiy dsaiy adsiy dasiy siday isday sdiay dsiay idsay disay aidsy iadsy adisy daisy idasy diasy syida ysida siyda isyda yisda iysda sydia ysdia sdyia dsyia ydsia dysia sidya isdya sdiya dsiya idsya disya yidsa iydsa ydisa dyisa idysa diysa ayids yaids aiyds iayds yiads iyads aydis yadis adyis dayis ydais dyais aidys iadys adiys daiys idays diays yidas iydas ydias dyias idyas diyas
Note: these 'words' (valid or invalid) are all the permutations of the word sayid. These words are obtained by scrambling the letters in sayid.