ervil revil evril veril rveil vreil erivl reivl eirvl iervl rievl irevl evirl veirl eivrl ievrl vierl iverl rviel vriel rivel irvel virel ivrel ervli revli evrli verli rveli vreli erlvi relvi elrvi lervi rlevi lrevi evlri velri elvri levri vleri lveri rvlei vrlei rlvei lrvei vlrei lvrei erilv reilv eirlv ierlv rielv irelv erliv reliv elriv leriv rleiv lreiv eilrv ielrv elirv leirv ilerv lierv rilev irlev rliev lriev ilrev lirev evilr veilr eivlr ievlr vielr ivelr evlir velir elvir levir vleir lveir eilvr ielvr elivr leivr ilevr lievr viler ivler vlier lvier ilver liver rvile vrile rivle irvle virle ivrle rvlie vrlie rlvie lrvie vlrie lvrie rilve irlve rlive lrive ilrve lirve vilre ivlre vlire lvire ilvre livre
Note: these 'words' (valid or invalid) are all the permutations of the word ervil. These words are obtained by scrambling the letters in ervil.