sipper ispper spiper psiper ipsper pisper sipper ispper spiper psiper ipsper pisper sppier pspier sppier pspier ppsier ppsier ippser pipser ippser pipser ppiser ppiser sipepr ispepr spiepr psiepr ipsepr pisepr sieppr iseppr seippr esippr iesppr eisppr speipr pseipr sepipr espipr pesipr epsipr ipespr piespr iepspr eipspr peispr epispr sipepr ispepr spiepr psiepr ipsepr pisepr sieppr iseppr seippr esippr iesppr eisppr speipr pseipr sepipr espipr pesipr epsipr ipespr piespr iepspr eipspr peispr epispr sppeir pspeir sppeir pspeir ppseir ppseir spepir psepir seppir esppir pespir epspir spepir psepir seppir esppir pespir epspir ppesir ppesir pepsir eppsir pepsir eppsir ippesr pipesr ippesr pipesr ppiesr ppiesr ipepsr piepsr ieppsr eippsr peipsr epipsr ipepsr piepsr ieppsr eippsr peipsr epipsr ppeisr ppeisr pepisr eppisr pepisr eppisr sippre isppre spipre psipre ipspre pispre sippre isppre spipre psipre ipspre pispre sppire pspire sppire pspire ppsire ppsire ippsre pipsre ippsre pipsre ppisre ppisre siprpe isprpe spirpe psirpe ipsrpe pisrpe sirppe isrppe srippe rsippe irsppe risppe spripe psripe srpipe rspipe prsipe rpsipe iprspe pirspe irpspe ripspe prispe rpispe siprpe isprpe spirpe psirpe ipsrpe pisrpe sirppe isrppe srippe rsippe irsppe risppe spripe psripe srpipe rspipe prsipe rpsipe iprspe pirspe irpspe ripspe prispe rpispe spprie psprie spprie psprie ppsrie ppsrie sprpie psrpie srppie rsppie prspie rpspie sprpie psrpie srppie rsppie prspie rpspie pprsie pprsie prpsie rppsie prpsie rppsie ipprse piprse ipprse piprse ppirse ppirse iprpse pirpse irppse rippse pripse rpipse iprpse pirpse irppse rippse pripse rpipse pprise pprise prpise rppise prpise rppise siperp isperp spierp psierp ipserp piserp sieprp iseprp seiprp esiprp iesprp eisprp speirp pseirp sepirp espirp pesirp epsirp ipesrp piesrp iepsrp eipsrp peisrp episrp siprep isprep spirep psirep ipsrep pisrep sirpep isrpep sripep rsipep irspep rispep spriep psriep srpiep rspiep prsiep rpsiep iprsep pirsep irpsep ripsep prisep rpisep sierpp iserpp seirpp esirpp iesrpp eisrpp sirepp isrepp sriepp rsiepp irsepp risepp seripp esripp sreipp rseipp ersipp resipp ierspp eirspp irespp riespp erispp reispp sperip pserip seprip esprip pesrip epsrip spreip psreip srpeip rspeip prseip rpseip serpip esrpip srepip rsepip erspip respip persip eprsip presip rpesip erpsip repsip ipersp piersp ieprsp eiprsp peirsp epirsp ipresp piresp irpesp ripesp priesp rpiesp ierpsp eirpsp irepsp riepsp eripsp reipsp perisp eprisp preisp rpeisp erpisp repisp siperp isperp spierp psierp ipserp piserp sieprp iseprp seiprp esiprp iesprp eisprp speirp pseirp sepirp espirp pesirp epsirp ipesrp piesrp iepsrp eipsrp peisrp episrp siprep isprep spirep psirep ipsrep pisrep sirpep isrpep sripep rsipep irspep rispep spriep psriep srpiep rspiep prsiep rpsiep iprsep pirsep irpsep ripsep prisep rpisep sierpp iserpp seirpp esirpp iesrpp eisrpp sirepp isrepp sriepp rsiepp irsepp risepp seripp esripp sreipp rseipp ersipp resipp ierspp eirspp irespp riespp erispp reispp sperip pserip seprip esprip pesrip epsrip spreip psreip srpeip rspeip prseip rpseip serpip esrpip srepip rsepip erspip respip persip eprsip presip rpesip erpsip repsip ipersp piersp ieprsp eiprsp peirsp epirsp ipresp piresp irpesp ripesp priesp rpiesp ierpsp eirpsp irepsp riepsp eripsp reipsp perisp eprisp preisp rpeisp erpisp repisp spperi psperi spperi psperi ppseri ppseri spepri psepri seppri esppri pespri epspri spepri psepri seppri esppri pespri epspri ppesri ppesri pepsri eppsri pepsri eppsri spprei psprei spprei psprei ppsrei ppsrei sprpei psrpei srppei rsppei prspei rpspei sprpei psrpei srppei rsppei prspei rpspei pprsei pprsei prpsei rppsei prpsei rppsei sperpi pserpi seprpi esprpi pesrpi epsrpi sprepi psrepi srpepi rspepi prsepi rpsepi serppi esrppi sreppi rseppi ersppi resppi perspi eprspi prespi rpespi erpspi repspi sperpi pserpi seprpi esprpi pesrpi epsrpi sprepi psrepi srpepi rspepi prsepi rpsepi serppi esrppi sreppi rseppi ersppi resppi perspi eprspi prespi rpespi erpspi repspi ppersi ppersi peprsi epprsi peprsi epprsi ppresi ppresi prpesi rppesi prpesi rppesi perpsi eprpsi prepsi rpepsi erppsi reppsi perpsi eprpsi prepsi rpepsi erppsi reppsi ippers pipers ippers pipers ppiers ppiers ipeprs pieprs iepprs eipprs peiprs epiprs ipeprs pieprs iepprs eipprs peiprs epiprs ppeirs ppeirs pepirs eppirs pepirs eppirs ippres pipres ippres pipres ppires ppires iprpes pirpes irppes rippes pripes rpipes iprpes pirpes irppes rippes pripes rpipes ppries ppries prpies rppies prpies rppies iperps pierps ieprps eiprps peirps epirps ipreps pireps irpeps ripeps prieps rpieps ierpps eirpps irepps riepps eripps reipps perips eprips preips rpeips erpips repips iperps pierps ieprps eiprps peirps epirps ipreps pireps irpeps ripeps prieps rpieps ierpps eirpps irepps riepps eripps reipps perips eprips preips rpeips erpips repips pperis pperis pepris eppris pepris eppris ppreis ppreis prpeis rppeis prpeis rppeis perpis eprpis prepis rpepis erppis reppis perpis eprpis prepis rpepis erppis reppis
Note: these 'words' (valid or invalid) are all the permutations of the word sipper. These words are obtained by scrambling the letters in sipper.