curer ucrer cruer rcuer urcer rucer cuerr ucerr ceurr ecurr uecrr eucrr creur rceur cerur ecrur recur ercur urecr ruecr uercr eurcr reucr erucr curre ucrre crure rcure urcre rucre curre ucrre crure rcure urcre rucre crrue rcrue crrue rcrue rrcue rrcue urrce rurce urrce rurce rruce rruce cuerr ucerr ceurr ecurr uecrr eucrr curer ucrer cruer rcuer urcer rucer cerur ecrur creur rceur ercur recur uercr eurcr urecr ruecr erucr reucr creru rceru cerru ecrru recru ercru crreu rcreu crreu rcreu rrceu rrceu cerru ecrru creru rceru ercru recru rercu errcu rrecu rrecu errcu rercu urerc ruerc uerrc eurrc reurc erurc urrec rurec urrec rurec rruec rruec uerrc eurrc urerc ruerc erurc reurc reruc erruc rreuc rreuc erruc reruc
Note: these 'words' (valid or invalid) are all the permutations of the word curer. These words are obtained by scrambling the letters in curer.