ecvrs cevrs evcrs vecrs cvers vcers ecrvs cervs ercvs recvs crevs rcevs evrcs vercs ervcs revcs vrecs rvecs cvres vcres crves rcves vrces rvces ecvsr cevsr evcsr vecsr cvesr vcesr ecsvr cesvr escvr secvr csevr scevr evscr vescr esvcr sevcr vsecr svecr cvser vcser csver scver vscer svcer ecrsv cersv ercsv recsv cresv rcesv ecsrv cesrv escrv secrv cserv scerv erscv rescv esrcv sercv rsecv srecv crsev rcsev csrev screv rscev srcev evrsc versc ervsc revsc vresc rvesc evsrc vesrc esvrc sevrc vserc sverc ersvc resvc esrvc servc rsevc srevc vrsec rvsec vsrec svrec rsvec srvec cvrse vcrse crvse rcvse vrcse rvcse cvsre vcsre csvre scvre vscre svcre crsve rcsve csrve scrve rscve srcve vrsce rvsce vsrce svrce rsvce srvce
Note: these 'words' (valid or invalid) are all the permutations of the word ecvrs. These words are obtained by scrambling the letters in ecvrs.