paper apper ppaer ppaer apper paper paepr apepr peapr epapr aeppr eappr ppear ppear pepar eppar pepar eppar apepr paepr aeppr eappr peapr epapr papre appre ppare ppare appre papre parpe aprpe prape rpape arppe rappe pprae pprae prpae rppae prpae rppae aprpe parpe arppe rappe prape rpape paerp aperp pearp eparp aeprp eaprp parep aprep praep rpaep arpep rapep perap eprap preap rpeap erpap repap aerpp earpp arepp raepp erapp reapp ppera ppera pepra eppra pepra eppra pprea pprea prpea rppea prpea rppea perpa eprpa prepa rpepa erppa reppa perpa eprpa prepa rpepa erppa reppa aperp paerp aeprp eaprp pearp eparp aprep parep arpep rapep praep rpaep aerpp earpp arepp raepp erapp reapp perap eprap preap rpeap erpap repap
Note: these 'words' (valid or invalid) are all the permutations of the word paper. These words are obtained by scrambling the letters in paper.