rshea srhea rhsea hrsea shrea hsrea rseha sreha resha ersha serha esrha rhesa hresa rehsa erhsa hersa ehrsa shera hsera sehra eshra hesra ehsra rshae srhae rhsae hrsae shrae hsrae rsahe srahe rashe arshe sarhe asrhe rhase hrase rahse arhse harse ahrse share hsare sahre ashre hasre ahsre rseah sreah resah ersah serah esrah rsaeh sraeh raseh arseh sareh asreh reash erash raesh aresh earsh aersh searh esarh saerh aserh easrh aesrh rheas hreas rehas erhas heras ehras rhaes hraes rahes arhes hares ahres reahs erahs raehs arehs earhs aerhs hears ehars haers ahers eahrs aehrs shear hsear sehar eshar hesar ehsar shaer hsaer saher asher haser ahser seahr esahr saehr asehr eashr aeshr heasr ehasr haesr ahesr eahsr aehsr
Note: these 'words' (valid or invalid) are all the permutations of the word rshea. These words are obtained by scrambling the letters in rshea.