yipper iypper ypiper pyiper ipyper piyper yipper iypper ypiper pyiper ipyper piyper yppier pypier yppier pypier ppyier ppyier ippyer pipyer ippyer pipyer ppiyer ppiyer yipepr iypepr ypiepr pyiepr ipyepr piyepr yieppr iyeppr yeippr eyippr ieyppr eiyppr ypeipr pyeipr yepipr eypipr peyipr epyipr ipeypr pieypr iepypr eipypr peiypr epiypr yipepr iypepr ypiepr pyiepr ipyepr piyepr yieppr iyeppr yeippr eyippr ieyppr eiyppr ypeipr pyeipr yepipr eypipr peyipr epyipr ipeypr pieypr iepypr eipypr peiypr epiypr yppeir pypeir yppeir pypeir ppyeir ppyeir ypepir pyepir yeppir eyppir peypir epypir ypepir pyepir yeppir eyppir peypir epypir ppeyir ppeyir pepyir eppyir pepyir eppyir ippeyr pipeyr ippeyr pipeyr ppieyr ppieyr ipepyr piepyr ieppyr eippyr peipyr epipyr ipepyr piepyr ieppyr eippyr peipyr epipyr ppeiyr ppeiyr pepiyr eppiyr pepiyr eppiyr yippre iyppre ypipre pyipre ipypre piypre yippre iyppre ypipre pyipre ipypre piypre yppire pypire yppire pypire ppyire ppyire ippyre pipyre ippyre pipyre ppiyre ppiyre yiprpe iyprpe ypirpe pyirpe ipyrpe piyrpe yirppe iyrppe yrippe ryippe iryppe riyppe ypripe pyripe yrpipe rypipe pryipe rpyipe iprype pirype irpype ripype priype rpiype yiprpe iyprpe ypirpe pyirpe ipyrpe piyrpe yirppe iyrppe yrippe ryippe iryppe riyppe ypripe pyripe yrpipe rypipe pryipe rpyipe iprype pirype irpype ripype priype rpiype ypprie pyprie ypprie pyprie ppyrie ppyrie yprpie pyrpie yrppie ryppie prypie rpypie yprpie pyrpie yrppie ryppie prypie rpypie ppryie ppryie prpyie rppyie prpyie rppyie ipprye piprye ipprye piprye ppirye ppirye iprpye pirpye irppye rippye pripye rpipye iprpye pirpye irppye rippye pripye rpipye ppriye ppriye prpiye rppiye prpiye rppiye yiperp iyperp ypierp pyierp ipyerp piyerp yieprp iyeprp yeiprp eyiprp ieyprp eiyprp ypeirp pyeirp yepirp eypirp peyirp epyirp ipeyrp pieyrp iepyrp eipyrp peiyrp epiyrp yiprep iyprep ypirep pyirep ipyrep piyrep yirpep iyrpep yripep ryipep irypep riypep ypriep pyriep yrpiep rypiep pryiep rpyiep ipryep piryep irpyep ripyep priyep rpiyep yierpp iyerpp yeirpp eyirpp ieyrpp eiyrpp yirepp iyrepp yriepp ryiepp iryepp riyepp yeripp eyripp yreipp ryeipp eryipp reyipp ierypp eirypp ireypp rieypp eriypp reiypp yperip pyerip yeprip eyprip peyrip epyrip ypreip pyreip yrpeip rypeip pryeip rpyeip yerpip eyrpip yrepip ryepip erypip reypip peryip epryip preyip rpeyip erpyip repyip iperyp pieryp iepryp eipryp peiryp epiryp ipreyp pireyp irpeyp ripeyp prieyp rpieyp ierpyp eirpyp irepyp riepyp eripyp reipyp periyp epriyp preiyp rpeiyp erpiyp repiyp yiperp iyperp ypierp pyierp ipyerp piyerp yieprp iyeprp yeiprp eyiprp ieyprp eiyprp ypeirp pyeirp yepirp eypirp peyirp epyirp ipeyrp pieyrp iepyrp eipyrp peiyrp epiyrp yiprep iyprep ypirep pyirep ipyrep piyrep yirpep iyrpep yripep ryipep irypep riypep ypriep pyriep yrpiep rypiep pryiep rpyiep ipryep piryep irpyep ripyep priyep rpiyep yierpp iyerpp yeirpp eyirpp ieyrpp eiyrpp yirepp iyrepp yriepp ryiepp iryepp riyepp yeripp eyripp yreipp ryeipp eryipp reyipp ierypp eirypp ireypp rieypp eriypp reiypp yperip pyerip yeprip eyprip peyrip epyrip ypreip pyreip yrpeip rypeip pryeip rpyeip yerpip eyrpip yrepip ryepip erypip reypip peryip epryip preyip rpeyip erpyip repyip iperyp pieryp iepryp eipryp peiryp epiryp ipreyp pireyp irpeyp ripeyp prieyp rpieyp ierpyp eirpyp irepyp riepyp eripyp reipyp periyp epriyp preiyp rpeiyp erpiyp repiyp ypperi pyperi ypperi pyperi ppyeri ppyeri ypepri pyepri yeppri eyppri peypri epypri ypepri pyepri yeppri eyppri peypri epypri ppeyri ppeyri pepyri eppyri pepyri eppyri ypprei pyprei ypprei pyprei ppyrei ppyrei yprpei pyrpei yrppei ryppei prypei rpypei yprpei pyrpei yrppei ryppei prypei rpypei ppryei ppryei prpyei rppyei prpyei rppyei yperpi pyerpi yeprpi eyprpi peyrpi epyrpi yprepi pyrepi yrpepi rypepi pryepi rpyepi yerppi eyrppi yreppi ryeppi eryppi reyppi perypi eprypi preypi rpeypi erpypi repypi yperpi pyerpi yeprpi eyprpi peyrpi epyrpi yprepi pyrepi yrpepi rypepi pryepi rpyepi yerppi eyrppi yreppi ryeppi eryppi reyppi perypi eprypi preypi rpeypi erpypi repypi pperyi pperyi pepryi eppryi pepryi eppryi ppreyi ppreyi prpeyi rppeyi prpeyi rppeyi perpyi eprpyi prepyi rpepyi erppyi reppyi perpyi eprpyi prepyi rpepyi erppyi reppyi ippery pipery ippery pipery ppiery ppiery ipepry piepry ieppry eippry peipry epipry ipepry piepry ieppry eippry peipry epipry ppeiry ppeiry pepiry eppiry pepiry eppiry ipprey piprey ipprey piprey ppirey ppirey iprpey pirpey irppey rippey pripey rpipey iprpey pirpey irppey rippey pripey rpipey ppriey ppriey prpiey rppiey prpiey rppiey iperpy pierpy ieprpy eiprpy peirpy epirpy iprepy pirepy irpepy ripepy priepy rpiepy ierppy eirppy ireppy rieppy erippy reippy peripy epripy preipy rpeipy erpipy repipy iperpy pierpy ieprpy eiprpy peirpy epirpy iprepy pirepy irpepy ripepy priepy rpiepy ierppy eirppy ireppy rieppy erippy reippy peripy epripy preipy rpeipy erpipy repipy pperiy pperiy pepriy eppriy pepriy eppriy ppreiy ppreiy prpeiy rppeiy prpeiy rppeiy perpiy eprpiy prepiy rpepiy erppiy reppiy perpiy eprpiy prepiy rpepiy erppiy reppiy
Note: these 'words' (valid or invalid) are all the permutations of the word yipper. These words are obtained by scrambling the letters in yipper.