empty mepty epmty pemty mpety pmety emtpy metpy etmpy tempy mtepy tmepy eptmy petmy etpmy tepmy ptemy tpemy mptey pmtey mtpey tmpey ptmey tpmey empyt mepyt epmyt pemyt mpeyt pmeyt emypt meypt eympt yempt myept ymept epymt peymt eypmt yepmt pyemt ypemt mpyet pmyet mypet ympet pymet ypmet emtyp metyp etmyp temyp mteyp tmeyp emytp meytp eymtp yemtp myetp ymetp etymp teymp eytmp yetmp tyemp ytemp mtyep tmyep mytep ymtep tymep ytmep eptym petym etpym tepym pteym tpeym epytm peytm eyptm yeptm pyetm ypetm etypm teypm eytpm yetpm tyepm ytepm ptyem tpyem pytem yptem typem ytpem mptye pmtye mtpye tmpye ptmye tpmye mpyte pmyte mypte ympte pymte ypmte mtype tmype mytpe ymtpe tympe ytmpe ptyme tpyme pytme yptme typme ytpme
Note: these 'words' (valid or invalid) are all the permutations of the word empty. These words are obtained by scrambling the letters in empty.