heady ehady haedy ahedy eahdy aehdy heday ehday hdeay dheay edhay dehay hadey ahdey hdaey dhaey adhey dahey eadhy aedhy edahy deahy adehy daehy heayd ehayd haeyd aheyd eahyd aehyd heyad ehyad hyead yhead eyhad yehad hayed ahyed hyaed yhaed ayhed yahed eayhd aeyhd eyahd yeahd ayehd yaehd hedya ehdya hdeya dheya edhya dehya heyda ehyda hyeda yheda eyhda yehda hdyea dhyea hydea yhdea dyhea ydhea edyha deyha eydha yedha dyeha ydeha hadye ahdye hdaye dhaye adhye dahye hayde ahyde hyade yhade ayhde yahde hdyae dhyae hydae yhdae dyhae ydhae adyhe dayhe aydhe yadhe dyahe ydahe eadyh aedyh edayh deayh adeyh daeyh eaydh aeydh eyadh yeadh ayedh yaedh edyah deyah eydah yedah dyeah ydeah adyeh dayeh aydeh yadeh dyaeh ydaeh
Note: these 'words' (valid or invalid) are all the permutations of the word heady. These words are obtained by scrambling the letters in heady.