hdyar dhyar hydar yhdar dyhar ydhar hdayr dhayr hadyr ahdyr dahyr adhyr hyadr yhadr haydr ahydr yahdr ayhdr dyahr ydahr dayhr adyhr yadhr aydhr hdyra dhyra hydra yhdra dyhra ydhra hdrya dhrya hrdya rhdya drhya rdhya hyrda yhrda hryda rhyda yrhda ryhda dyrha ydrha dryha rdyha yrdha rydha hdary dhary hadry ahdry dahry adhry hdray dhray hrday rhday drhay rdhay hardy ahrdy hrady rhady arhdy rahdy darhy adrhy drahy rdahy ardhy radhy hyard yhard hayrd ahyrd yahrd ayhrd hyrad yhrad hryad rhyad yrhad ryhad haryd ahryd hrayd rhayd arhyd rahyd yarhd ayrhd yrahd ryahd aryhd rayhd dyarh ydarh dayrh adyrh yadrh aydrh dyrah ydrah dryah rdyah yrdah rydah daryh adryh drayh rdayh ardyh radyh yardh ayrdh yradh ryadh arydh raydh
Note: these 'words' (valid or invalid) are all the permutations of the word hdyar. These words are obtained by scrambling the letters in hdyar.