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