nremc rnemc nermc enrmc renmc ernmc nrmec rnmec nmrec mnrec rmnec mrnec nemrc enmrc nmerc mnerc emnrc menrc remnc ermnc rmenc mrenc emrnc mernc nrecm rnecm nercm enrcm rencm erncm nrcem rncem ncrem cnrem rcnem crnem necrm encrm ncerm cnerm ecnrm cenrm recnm ercnm rcenm crenm ecrnm cernm nrmce rnmce nmrce mnrce rmnce mrnce nrcme rncme ncrme cnrme rcnme crnme nmcre mncre ncmre cnmre mcnre cmnre rmcne mrcne rcmne crmne mcrne cmrne nemcr enmcr nmecr mnecr emncr mencr necmr encmr ncemr cnemr ecnmr cenmr nmcer mncer ncmer cnmer mcner cmner emcnr mecnr ecmnr cemnr mcenr cmenr remcn ermcn rmecn mrecn emrcn mercn recmn ercmn rcemn cremn ecrmn cermn rmcen mrcen rcmen crmen mcren cmren emcrn mecrn ecmrn cemrn mcern cmern
Note: these 'words' (valid or invalid) are all the permutations of the word nremc. These words are obtained by scrambling the letters in nremc.