ndews dnews nedws endws denws ednws ndwes dnwes nwdes wndes dwnes wdnes newds enwds nweds wneds ewnds wends dewns edwns dwens wdens ewdns wedns ndesw dnesw nedsw endsw densw ednsw ndsew dnsew nsdew sndew dsnew sdnew nesdw ensdw nsedw snedw esndw sendw desnw edsnw dsenw sdenw esdnw sednw ndwse dnwse nwdse wndse dwnse wdnse ndswe dnswe nsdwe sndwe dsnwe sdnwe nwsde wnsde nswde snwde wsnde swnde dwsne wdsne dswne sdwne wsdne swdne newsd enwsd nwesd wnesd ewnsd wensd neswd enswd nsewd snewd esnwd senwd nwsed wnsed nswed snwed wsned swned ewsnd wesnd eswnd sewnd wsend swend dewsn edwsn dwesn wdesn ewdsn wedsn deswn edswn dsewn sdewn esdwn sedwn dwsen wdsen dswen sdwen wsden swden ewsdn wesdn eswdn sewdn wsedn swedn
Note: these 'words' (valid or invalid) are all the permutations of the word ndews. These words are obtained by scrambling the letters in ndews.