lston slton ltson tlson stlon tslon lsotn slotn lostn olstn soltn osltn ltosn tlosn lotsn oltsn tolsn otlsn stoln tsoln sotln ostln tosln otsln lstno sltno ltsno tlsno stlno tslno lsnto slnto lnsto nlsto snlto nslto ltnso tlnso lntso nltso tnlso ntlso stnlo tsnlo sntlo nstlo tnslo ntslo lsont slont losnt olsnt solnt oslnt lsnot slnot lnsot nlsot snlot nslot lonst olnst lnost nlost onlst nolst sonlt osnlt snolt nsolt onslt noslt ltons tlons lotns oltns tolns otlns ltnos tlnos lntos nltos tnlos ntlos lonts olnts lnots nlots onlts nolts tonls otnls tnols ntols ontls notls stonl tsonl sotnl ostnl tosnl otsnl stnol tsnol sntol nstol tnsol ntsol sontl osntl snotl nsotl onstl nostl tonsl otnsl tnosl ntosl ontsl notsl
Note: these 'words' (valid or invalid) are all the permutations of the word lston. These words are obtained by scrambling the letters in lston.