yapper aypper ypaper pyaper apyper payper yapper aypper ypaper pyaper apyper payper yppaer pypaer yppaer pypaer ppyaer ppyaer appyer papyer appyer papyer ppayer ppayer yapepr aypepr ypaepr pyaepr apyepr payepr yaeppr ayeppr yeappr eyappr aeyppr eayppr ypeapr pyeapr yepapr eypapr peyapr epyapr apeypr paeypr aepypr eapypr peaypr epaypr yapepr aypepr ypaepr pyaepr apyepr payepr yaeppr ayeppr yeappr eyappr aeyppr eayppr ypeapr pyeapr yepapr eypapr peyapr epyapr apeypr paeypr aepypr eapypr peaypr epaypr yppear pypear yppear pypear ppyear ppyear ypepar pyepar yeppar eyppar peypar epypar ypepar pyepar yeppar eyppar peypar epypar ppeyar ppeyar pepyar eppyar pepyar eppyar appeyr papeyr appeyr papeyr ppaeyr ppaeyr apepyr paepyr aeppyr eappyr peapyr epapyr apepyr paepyr aeppyr eappyr peapyr epapyr ppeayr ppeayr pepayr eppayr pepayr eppayr yappre ayppre ypapre pyapre apypre paypre yappre ayppre ypapre pyapre apypre paypre yppare pypare yppare pypare ppyare ppyare appyre papyre appyre papyre ppayre ppayre yaprpe ayprpe yparpe pyarpe apyrpe payrpe yarppe ayrppe yrappe ryappe aryppe rayppe yprape pyrape yrpape rypape pryape rpyape aprype parype arpype rapype praype rpaype yaprpe ayprpe yparpe pyarpe apyrpe payrpe yarppe ayrppe yrappe ryappe aryppe rayppe yprape pyrape yrpape rypape pryape rpyape aprype parype arpype rapype praype rpaype ypprae pyprae ypprae pyprae ppyrae ppyrae yprpae pyrpae yrppae ryppae prypae rpypae yprpae pyrpae yrppae ryppae prypae rpypae ppryae ppryae prpyae rppyae prpyae rppyae apprye paprye apprye paprye pparye pparye aprpye parpye arppye rappye prapye rpapye aprpye parpye arppye rappye prapye rpapye ppraye ppraye prpaye rppaye prpaye rppaye yaperp ayperp ypaerp pyaerp apyerp payerp yaeprp ayeprp yeaprp eyaprp aeyprp eayprp ypearp pyearp yeparp eyparp peyarp epyarp apeyrp paeyrp aepyrp eapyrp peayrp epayrp yaprep ayprep yparep pyarep apyrep payrep yarpep ayrpep yrapep ryapep arypep raypep ypraep pyraep yrpaep rypaep pryaep rpyaep apryep paryep arpyep rapyep prayep rpayep yaerpp ayerpp yearpp eyarpp aeyrpp eayrpp yarepp ayrepp yraepp ryaepp aryepp rayepp yerapp eyrapp yreapp ryeapp eryapp reyapp aerypp earypp areypp raeypp eraypp reaypp yperap pyerap yeprap eyprap peyrap epyrap ypreap pyreap yrpeap rypeap pryeap rpyeap yerpap eyrpap yrepap ryepap erypap reypap peryap epryap preyap rpeyap erpyap repyap aperyp paeryp aepryp eapryp pearyp eparyp apreyp pareyp arpeyp rapeyp praeyp rpaeyp aerpyp earpyp arepyp raepyp erapyp reapyp perayp eprayp preayp rpeayp erpayp repayp yaperp ayperp ypaerp pyaerp apyerp payerp yaeprp ayeprp yeaprp eyaprp aeyprp eayprp ypearp pyearp yeparp eyparp peyarp epyarp apeyrp paeyrp aepyrp eapyrp peayrp epayrp yaprep ayprep yparep pyarep apyrep payrep yarpep ayrpep yrapep ryapep arypep raypep ypraep pyraep yrpaep rypaep pryaep rpyaep apryep paryep arpyep rapyep prayep rpayep yaerpp ayerpp yearpp eyarpp aeyrpp eayrpp yarepp ayrepp yraepp ryaepp aryepp rayepp yerapp eyrapp yreapp ryeapp eryapp reyapp aerypp earypp areypp raeypp eraypp reaypp yperap pyerap yeprap eyprap peyrap epyrap ypreap pyreap yrpeap rypeap pryeap rpyeap yerpap eyrpap yrepap ryepap erypap reypap peryap epryap preyap rpeyap erpyap repyap aperyp paeryp aepryp eapryp pearyp eparyp apreyp pareyp arpeyp rapeyp praeyp rpaeyp aerpyp earpyp arepyp raepyp erapyp reapyp perayp eprayp preayp rpeayp erpayp repayp yppera pypera yppera pypera ppyera ppyera ypepra pyepra yeppra eyppra peypra epypra ypepra pyepra yeppra eyppra peypra epypra ppeyra ppeyra pepyra eppyra pepyra eppyra ypprea pyprea ypprea pyprea ppyrea ppyrea yprpea pyrpea yrppea ryppea prypea rpypea yprpea pyrpea yrppea ryppea prypea rpypea ppryea ppryea prpyea rppyea prpyea rppyea yperpa pyerpa yeprpa eyprpa peyrpa epyrpa yprepa pyrepa yrpepa rypepa pryepa rpyepa yerppa eyrppa yreppa ryeppa eryppa reyppa perypa eprypa preypa rpeypa erpypa repypa yperpa pyerpa yeprpa eyprpa peyrpa epyrpa yprepa pyrepa yrpepa rypepa pryepa rpyepa yerppa eyrppa yreppa ryeppa eryppa reyppa perypa eprypa preypa rpeypa erpypa repypa pperya pperya peprya epprya peprya epprya ppreya ppreya prpeya rppeya prpeya rppeya perpya eprpya prepya rpepya erppya reppya perpya eprpya prepya rpepya erppya reppya appery papery appery papery ppaery ppaery apepry paepry aeppry eappry peapry epapry apepry paepry aeppry eappry peapry epapry ppeary ppeary pepary eppary pepary eppary apprey paprey apprey paprey pparey pparey aprpey parpey arppey rappey prapey rpapey aprpey parpey arppey rappey prapey rpapey ppraey ppraey prpaey rppaey prpaey rppaey aperpy paerpy aeprpy eaprpy pearpy eparpy aprepy parepy arpepy rapepy praepy rpaepy aerppy earppy areppy raeppy erappy reappy perapy eprapy preapy rpeapy erpapy repapy aperpy paerpy aeprpy eaprpy pearpy eparpy aprepy parepy arpepy rapepy praepy rpaepy aerppy earppy areppy raeppy erappy reappy perapy eprapy preapy rpeapy erpapy repapy pperay pperay pepray eppray pepray eppray ppreay ppreay prpeay rppeay prpeay rppeay perpay eprpay prepay rpepay erppay reppay perpay eprpay prepay rpepay erppay reppay
Note: these 'words' (valid or invalid) are all the permutations of the word yapper. These words are obtained by scrambling the letters in yapper.