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