netsd entsd ntesd tnesd etnsd tensd nestd enstd nsetd snetd esntd sentd ntsed tnsed nsted snted tsned stned etsnd tesnd estnd setnd tsend stend netds entds nteds tneds etnds tends nedts endts ndets dnets ednts dents ntdes tndes ndtes dntes tdnes dtnes etdns tedns edtns detns tdens dtens nesdt ensdt nsedt snedt esndt sendt nedst endst ndest dnest ednst denst nsdet sndet ndset dnset sdnet dsnet esdnt sednt edsnt desnt sdent dsent ntsde tnsde nstde sntde tsnde stnde ntdse tndse ndtse dntse tdnse dtnse nsdte sndte ndste dnste sdnte dsnte tsdne stdne tdsne dtsne sdtne dstne etsdn tesdn estdn setdn tsedn stedn etdsn tedsn edtsn detsn tdesn dtesn esdtn sedtn edstn destn sdetn dsetn tsden stden tdsen dtsen sdten dsten
Note: these 'words' (valid or invalid) are all the permutations of the word netsd. These words are obtained by scrambling the letters in netsd.