aeirs eairs aiers iaers eiars iears aeris earis areis raeis erais reais aires iares aries raies iraes riaes eiras ieras erias reias ireas rieas aeisr eaisr aiesr iaesr eiasr ieasr aesir easir aseir saeir esair seair aiser iaser asier saier isaer siaer eisar iesar esiar seiar isear siear aersi earsi aresi raesi erasi reasi aesri easri aseri saeri esari seari arsei rasei asrei sarei rsaei sraei ersai resai esrai serai rseai sreai airse iarse arise raise irase riase aisre iasre asire saire isare siare arsie rasie asrie sarie rsaie sraie irsae risae israe sirae rsiae sriae eirsa iersa erisa reisa iresa riesa eisra iesra esira seira isera siera ersia resia esria seria rseia sreia irsea risea isrea sirea rsiea sriea
Note: these 'words' (valid or invalid) are all the permutations of the word aeirs. These words are obtained by scrambling the letters in aeirs.