niads inads naids anids iands ainds nidas indas ndias dnias idnas dinas nadis andis ndais dnais adnis danis iadns aidns idans dians adins dains niasd inasd naisd anisd iansd ainsd nisad insad nsiad sniad isnad sinad nasid ansid nsaid snaid asnid sanid iasnd aisnd isand siand asind saind nidsa indsa ndisa dnisa idnsa dinsa nisda insda nsida snida isnda sinda ndsia dnsia nsdia sndia dsnia sdnia idsna disna isdna sidna dsina sdina nadsi andsi ndasi dnasi adnsi dansi nasdi ansdi nsadi snadi asndi sandi ndsai dnsai nsdai sndai dsnai sdnai adsni dasni asdni sadni dsani sdani iadsn aidsn idasn diasn adisn daisn iasdn aisdn isadn siadn asidn saidn idsan disan isdan sidan dsian sdian adsin dasin asdin sadin dsain sdain
Note: these 'words' (valid or invalid) are all the permutations of the word niads. These words are obtained by scrambling the letters in niads.