prems rpems perms eprms repms erpms prmes rpmes pmres mpres rmpes mrpes pemrs epmrs pmers mpers emprs meprs remps ermps rmeps mreps emrps merps presm rpesm persm eprsm repsm erpsm prsem rpsem psrem sprem rspem srpem pesrm epsrm pserm sperm esprm seprm respm erspm rsepm srepm esrpm serpm prmse rpmse pmrse mprse rmpse mrpse prsme rpsme psrme sprme rspme srpme pmsre mpsre psmre spmre mspre smpre rmspe mrspe rsmpe srmpe msrpe smrpe pemsr epmsr pmesr mpesr empsr mepsr pesmr epsmr psemr spemr espmr sepmr pmser mpser psmer spmer msper smper emspr mespr esmpr sempr msepr smepr remsp ermsp rmesp mresp emrsp mersp resmp ersmp rsemp sremp esrmp sermp rmsep mrsep rsmep srmep msrep smrep emsrp mesrp esmrp semrp mserp smerp
Note: these 'words' (valid or invalid) are all the permutations of the word prems. These words are obtained by scrambling the letters in prems.