decks edcks dceks cdeks ecdks cedks dekcs edkcs dkecs kdecs ekdcs kedcs dckes cdkes dkces kdces ckdes kcdes eckds cekds ekcds kecds ckeds kceds decsk edcsk dcesk cdesk ecdsk cedsk desck edsck dseck sdeck esdck sedck dcsek cdsek dscek sdcek csdek scdek ecsdk cesdk escdk secdk csedk scedk deksc edksc dkesc kdesc ekdsc kedsc deskc edskc dsekc sdekc esdkc sedkc dksec kdsec dskec sdkec ksdec skdec eksdc kesdc eskdc sekdc ksedc skedc dckse cdkse dkcse kdcse ckdse kcdse dcske cdske dscke sdcke csdke scdke dksce kdsce dskce sdkce ksdce skdce cksde kcsde cskde sckde kscde skcde ecksd ceksd ekcsd kecsd ckesd kcesd ecskd ceskd esckd seckd csekd scekd ekscd kescd eskcd sekcd ksecd skecd cksed kcsed csked scked ksced skced
Note: these 'words' (valid or invalid) are all the permutations of the word decks. These words are obtained by scrambling the letters in decks.