primus rpimus pirmus iprmus ripmus irpmus prmius rpmius pmrius mprius rmpius mrpius pimrus ipmrus pmirus mpirus imprus miprus rimpus irmpus rmipus mripus imrpus mirpus priums rpiums pirums iprums ripums irpums pruims rpuims purims uprims rupims urpims piurms ipurms puirms upirms iuprms uiprms riupms irupms ruipms uripms iurpms uirpms prmuis rpmuis pmruis mpruis rmpuis mrpuis prumis rpumis purmis uprmis rupmis urpmis pmuris mpuris pumris upmris mupris umpris rmupis mrupis rumpis urmpis murpis umrpis pimurs ipmurs pmiurs mpiurs impurs mipurs piumrs ipumrs puimrs upimrs iupmrs uipmrs pmuirs mpuirs pumirs upmirs mupirs umpirs imuprs miuprs iumprs uimprs muiprs umiprs rimups irmups rmiups mriups imrups mirups riumps irumps ruimps urimps iurmps uirmps rmuips mruips rumips urmips murips umrips imurps miurps iumrps uimrps muirps umirps primsu rpimsu pirmsu iprmsu ripmsu irpmsu prmisu rpmisu pmrisu mprisu rmpisu mrpisu pimrsu ipmrsu pmirsu mpirsu imprsu miprsu rimpsu irmpsu rmipsu mripsu imrpsu mirpsu prismu rpismu pirsmu iprsmu ripsmu irpsmu prsimu rpsimu psrimu sprimu rspimu srpimu pisrmu ipsrmu psirmu spirmu isprmu siprmu rispmu irspmu rsipmu sripmu isrpmu sirpmu prmsiu rpmsiu pmrsiu mprsiu rmpsiu mrpsiu prsmiu rpsmiu psrmiu sprmiu rspmiu srpmiu pmsriu mpsriu psmriu spmriu mspriu smpriu rmspiu mrspiu rsmpiu srmpiu msrpiu smrpiu pimsru ipmsru pmisru mpisru impsru mipsru pismru ipsmru psimru spimru ispmru sipmru pmsiru mpsiru psmiru spmiru mspiru smpiru imspru mispru ismpru simpru msipru smipru rimspu irmspu rmispu mrispu imrspu mirspu rismpu irsmpu rsimpu srimpu isrmpu sirmpu rmsipu mrsipu rsmipu srmipu msripu smripu imsrpu misrpu ismrpu simrpu msirpu smirpu priusm rpiusm pirusm iprusm ripusm irpusm pruism rpuism purism uprism rupism urpism piursm ipursm puirsm upirsm iuprsm uiprsm riupsm irupsm ruipsm uripsm iurpsm uirpsm prisum rpisum pirsum iprsum ripsum irpsum prsium rpsium psrium sprium rspium srpium pisrum ipsrum psirum spirum isprum siprum rispum irspum rsipum sripum isrpum sirpum prusim rpusim pursim uprsim rupsim urpsim prsuim rpsuim psruim spruim rspuim srpuim pusrim upsrim psurim spurim usprim suprim ruspim urspim rsupim srupim usrpim surpim piusrm ipusrm puisrm upisrm iupsrm uipsrm pisurm ipsurm psiurm spiurm ispurm sipurm pusirm upsirm psuirm spuirm uspirm supirm iusprm uisprm isuprm siuprm usiprm suiprm riuspm iruspm ruispm urispm iurspm uirspm risupm irsupm rsiupm sriupm isrupm sirupm rusipm ursipm rsuipm sruipm usripm suripm iusrpm uisrpm isurpm siurpm usirpm suirpm prmusi rpmusi pmrusi mprusi rmpusi mrpusi prumsi rpumsi purmsi uprmsi rupmsi urpmsi pmursi mpursi pumrsi upmrsi muprsi umprsi rmupsi mrupsi rumpsi urmpsi murpsi umrpsi prmsui rpmsui pmrsui mprsui rmpsui mrpsui prsmui rpsmui psrmui sprmui rspmui srpmui pmsrui mpsrui psmrui spmrui msprui smprui rmspui mrspui rsmpui srmpui msrpui smrpui prusmi rpusmi pursmi uprsmi rupsmi urpsmi prsumi rpsumi psrumi sprumi rspumi srpumi pusrmi upsrmi psurmi spurmi usprmi suprmi ruspmi urspmi rsupmi srupmi usrpmi surpmi pmusri mpusri pumsri upmsri mupsri umpsri pmsuri mpsuri psmuri spmuri mspuri smpuri pusmri upsmri psumri spumri uspmri supmri muspri umspri msupri smupri usmpri sumpri rmuspi mruspi rumspi urmspi murspi umrspi rmsupi mrsupi rsmupi srmupi msrupi smrupi rusmpi ursmpi rsumpi srumpi usrmpi surmpi musrpi umsrpi msurpi smurpi usmrpi sumrpi pimusr ipmusr pmiusr mpiusr impusr mipusr piumsr ipumsr puimsr upimsr iupmsr uipmsr pmuisr mpuisr pumisr upmisr mupisr umpisr imupsr miupsr iumpsr uimpsr muipsr umipsr pimsur ipmsur pmisur mpisur impsur mipsur pismur ipsmur psimur spimur ispmur sipmur pmsiur mpsiur psmiur spmiur mspiur smpiur imspur mispur ismpur simpur msipur smipur piusmr ipusmr puismr upismr iupsmr uipsmr pisumr ipsumr psiumr spiumr ispumr sipumr pusimr upsimr psuimr spuimr uspimr supimr iuspmr uispmr isupmr siupmr usipmr suipmr pmusir mpusir pumsir upmsir mupsir umpsir pmsuir mpsuir psmuir spmuir mspuir smpuir pusmir upsmir psumir spumir uspmir supmir muspir umspir msupir smupir usmpir sumpir imuspr miuspr iumspr uimspr muispr umispr imsupr misupr ismupr simupr msiupr smiupr iusmpr uismpr isumpr siumpr usimpr suimpr musipr umsipr msuipr smuipr usmipr sumipr rimusp irmusp rmiusp mriusp imrusp mirusp riumsp irumsp ruimsp urimsp iurmsp uirmsp rmuisp mruisp rumisp urmisp murisp umrisp imursp miursp iumrsp uimrsp muirsp umirsp rimsup irmsup rmisup mrisup imrsup mirsup rismup irsmup rsimup srimup isrmup sirmup rmsiup mrsiup rsmiup srmiup msriup smriup imsrup misrup ismrup simrup msirup smirup riusmp irusmp ruismp urismp iursmp uirsmp risump irsump rsiump sriump isrump sirump rusimp ursimp rsuimp sruimp usrimp surimp iusrmp uisrmp isurmp siurmp usirmp suirmp rmusip mrusip rumsip urmsip mursip umrsip rmsuip mrsuip rsmuip srmuip msruip smruip rusmip ursmip rsumip srumip usrmip surmip musrip umsrip msurip smurip usmrip sumrip imusrp miusrp iumsrp uimsrp muisrp umisrp imsurp misurp ismurp simurp msiurp smiurp iusmrp uismrp isumrp siumrp usimrp suimrp musirp umsirp msuirp smuirp usmirp sumirp
Note: these 'words' (valid or invalid) are all the permutations of the word primus. These words are obtained by scrambling the letters in primus.