dalts adlts dlats ldats aldts ladts datls adtls dtals tdals atdls tadls dltas ldtas dtlas tdlas ltdas tldas altds latds atlds talds ltads tlads dalst adlst dlast ldast aldst ladst daslt adslt dsalt sdalt asdlt sadlt dlsat ldsat dslat sdlat lsdat sldat alsdt lasdt asldt saldt lsadt sladt datsl adtsl dtasl tdasl atdsl tadsl dastl adstl dsatl sdatl asdtl sadtl dtsal tdsal dstal sdtal tsdal stdal atsdl tasdl astdl satdl tsadl stadl dltsa ldtsa dtlsa tdlsa ltdsa tldsa dlsta ldsta dslta sdlta lsdta sldta dtsla tdsla dstla sdtla tsdla stdla ltsda tlsda lstda sltda tslda stlda altsd latsd atlsd talsd ltasd tlasd alstd lastd asltd saltd lsatd slatd atsld tasld astld satld tsald stald ltsad tlsad lstad sltad tslad stlad
Note: these 'words' (valid or invalid) are all the permutations of the word dalts. These words are obtained by scrambling the letters in dalts.