unsod nusod usnod sunod nsuod snuod unosd nuosd uonsd ounsd nousd onusd usond suond uosnd ousnd sound osund nsoud snoud nosud onsud sonud osnud unsdo nusdo usndo sundo nsudo snudo undso nudso udnso dunso nduso dnuso usdno sudno udsno dusno sduno dsuno nsduo snduo ndsuo dnsuo sdnuo dsnuo unods nuods uonds ounds nouds onuds undos nudos udnos dunos nduos dnuos uodns oudns udons duons oduns douns nodus ondus ndous dnous odnus donus usodn suodn uosdn ousdn soudn osudn usdon sudon udson duson sduon dsuon uodsn oudsn udosn duosn odusn dousn sodun osdun sdoun dsoun odsun dosun nsodu snodu nosdu onsdu sondu osndu nsdou sndou ndsou dnsou sdnou dsnou nodsu ondsu ndosu dnosu odnsu donsu sodnu osdnu sdonu dsonu odsnu dosnu
Note: these 'words' (valid or invalid) are all the permutations of the word unsod. These words are obtained by scrambling the letters in unsod.