ripers irpers rpiers priers iprers pirers rieprs ireprs reiprs eriprs ierprs eirprs rpeirs preirs repirs erpirs perirs eprirs iperrs pierrs ieprrs eiprrs peirrs epirrs ripres irpres rpires prires iprres pirres rirpes irrpes rripes rripes irrpes rirpes rpries prries rrpies rrpies prries rpries iprres pirres irpres ripres prires rpires rierps irerps reirps erirps ierrps eirrps rireps irreps rrieps rrieps irreps rireps rerips errips rreips rreips errips rerips ierrps eirrps irerps rierps erirps reirps rperis preris repris erpris perris eprris rpreis prreis rrpeis rrpeis prreis rpreis rerpis errpis rrepis rrepis errpis rerpis perris eprris preris rperis erpris repris iperrs pierrs ieprrs eiprrs peirrs epirrs iprers pirers irpers ripers priers rpiers ierprs eirprs ireprs rieprs eriprs reiprs perirs eprirs preirs rpeirs erpirs repirs ripesr irpesr rpiesr priesr ipresr piresr riepsr irepsr reipsr eripsr ierpsr eirpsr rpeisr preisr repisr erpisr perisr eprisr ipersr piersr ieprsr eiprsr peirsr epirsr ripser irpser rpiser priser iprser pirser risper irsper rsiper sriper isrper sirper rpsier prsier rspier srpier psrier sprier ipsrer pisrer isprer siprer psirer spirer riespr irespr reispr erispr ierspr eirspr risepr irsepr rsiepr sriepr isrepr sirepr resipr ersipr rseipr sreipr esripr seripr iesrpr eisrpr iserpr sierpr esirpr seirpr rpesir presir repsir erpsir persir eprsir rpseir prseir rspeir srpeir psreir spreir respir erspir rsepir srepir esrpir serpir pesrir epsrir pserir sperir esprir seprir ipesrr piesrr iepsrr eipsrr peisrr episrr ipserr piserr isperr siperr psierr spierr iesprr eisprr iseprr sieprr esiprr seiprr pesirr epsirr pseirr speirr espirr sepirr riprse irprse rpirse prirse iprrse pirrse rirpse irrpse rripse rripse irrpse rirpse rprise prrise rrpise rrpise prrise rprise iprrse pirrse irprse riprse prirse rpirse ripsre irpsre rpisre prisre iprsre pirsre rispre irspre rsipre sripre isrpre sirpre rpsire prsire rspire srpire psrire sprire ipsrre pisrre isprre siprre psirre spirre rirspe irrspe rrispe rrispe irrspe rirspe risrpe irsrpe rsirpe srirpe isrrpe sirrpe rrsipe rrsipe rsripe srripe rsripe srripe irsrpe risrpe isrrpe sirrpe rsirpe srirpe rprsie prrsie rrpsie rrpsie prrsie rprsie rpsrie prsrie rsprie srprie psrrie sprrie rrspie rrspie rsrpie srrpie rsrpie srrpie prsrie rpsrie psrrie sprrie rsprie srprie iprsre pirsre irpsre ripsre prisre rpisre ipsrre pisrre isprre siprre psirre spirre irspre rispre isrpre sirpre rsipre sripre prsire rpsire psrire sprire rspire srpire riersp irersp reirsp erirsp ierrsp eirrsp riresp irresp rriesp rriesp irresp riresp rerisp errisp rreisp rreisp errisp rerisp ierrsp eirrsp irersp riersp erirsp reirsp riesrp iresrp reisrp erisrp iersrp eirsrp riserp irserp rsierp srierp isrerp sirerp resirp ersirp rseirp sreirp esrirp serirp iesrrp eisrrp iserrp sierrp esirrp seirrp rirsep irrsep rrisep rrisep irrsep rirsep risrep irsrep rsirep srirep isrrep sirrep rrsiep rrsiep rsriep srriep rsriep srriep irsrep risrep isrrep sirrep rsirep srirep rersip errsip rresip rresip errsip rersip resrip ersrip rserip srerip esrrip serrip rrseip rrseip rsreip srreip rsreip srreip ersrip resrip esrrip serrip rserip srerip iersrp eirsrp iresrp riesrp erisrp reisrp iesrrp eisrrp iserrp sierrp esirrp seirrp irserp riserp isrerp sirerp rsierp srierp ersirp resirp esrirp serirp rseirp sreirp rpersi prersi reprsi erprsi perrsi eprrsi rpresi prresi rrpesi rrpesi prresi rpresi rerpsi errpsi rrepsi rrepsi errpsi rerpsi perrsi eprrsi prersi rpersi erprsi reprsi rpesri presri repsri erpsri persri eprsri rpseri prseri rsperi srperi psreri spreri respri erspri rsepri srepri esrpri serpri pesrri epsrri pserri sperri esprri seprri rprsei prrsei rrpsei rrpsei prrsei rprsei rpsrei prsrei rsprei srprei psrrei sprrei rrspei rrspei rsrpei srrpei rsrpei srrpei prsrei rpsrei psrrei sprrei rsprei srprei rerspi errspi rrespi rrespi errspi rerspi resrpi ersrpi rserpi srerpi esrrpi serrpi rrsepi rrsepi rsrepi srrepi rsrepi srrepi ersrpi resrpi esrrpi serrpi rserpi srerpi persri eprsri presri rpesri erpsri repsri pesrri epsrri pserri sperri esprri seprri prseri rpseri psreri spreri rsperi srperi erspri respri esrpri serpri rsepri srepri ipersr piersr ieprsr eiprsr peirsr epirsr ipresr piresr irpesr ripesr priesr rpiesr ierpsr eirpsr irepsr riepsr eripsr reipsr perisr eprisr preisr rpeisr erpisr repisr ipesrr piesrr iepsrr eipsrr peisrr episrr ipserr piserr isperr siperr psierr spierr iesprr eisprr iseprr sieprr esiprr seiprr pesirr epsirr pseirr speirr espirr sepirr iprser pirser irpser ripser priser rpiser ipsrer pisrer isprer siprer psirer spirer irsper risper isrper sirper rsiper sriper prsier rpsier psrier sprier rspier srpier ierspr eirspr irespr riespr erispr reispr iesrpr eisrpr iserpr sierpr esirpr seirpr irsepr risepr isrepr sirepr rsiepr sriepr ersipr resipr esripr seripr rseipr sreipr persir eprsir presir rpesir erpsir repsir pesrir epsrir pserir sperir esprir seprir prseir rpseir psreir spreir rspeir srpeir erspir respir esrpir serpir rsepir srepir
Note: these 'words' (valid or invalid) are all the permutations of the word ripers. These words are obtained by scrambling the letters in ripers.