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