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esrppa serppa rseppa sreppa perspa eprspa prespa rpespa erpspa repspa pesrpa epsrpa pserpa sperpa esprpa seprpa prsepa rpsepa psrepa sprepa rspepa srpepa ersppa resppa esrppa serppa rseppa sreppa apersp paersp aeprsp eaprsp pearsp eparsp apresp paresp arpesp rapesp praesp rpaesp aerpsp earpsp arepsp raepsp erapsp reapsp perasp eprasp preasp rpeasp erpasp repasp apesrp paesrp aepsrp eapsrp peasrp epasrp apserp paserp asperp saperp psaerp spaerp aesprp easprp aseprp saeprp esaprp seaprp pesarp epsarp psearp spearp esparp separp aprsep parsep arpsep rapsep prasep rpasep apsrep pasrep asprep saprep psarep sparep arspep raspep asrpep sarpep rsapep srapep prsaep rpsaep psraep spraep rspaep srpaep aerspp earspp arespp raespp eraspp reaspp aesrpp easrpp aserpp saerpp esarpp searpp arsepp rasepp asrepp sarepp rsaepp sraepp ersapp resapp esrapp serapp rseapp sreapp persap eprsap presap rpesap erpsap repsap pesrap epsrap pserap sperap esprap seprap prseap rpseap psreap spreap rspeap srpeap erspap 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Note: these 'words' (valid or invalid) are all the permutations of the word papers. These words are obtained by scrambling the letters in papers.