apers paers aeprs eaprs pears epars apres pares arpes rapes praes rpaes aerps earps areps raeps eraps reaps peras epras preas rpeas erpas repas apesr paesr aepsr eapsr peasr epasr apser paser asper saper psaer spaer aespr easpr asepr saepr esapr seapr pesar epsar psear spear espar separ aprse parse arpse rapse prase rpase apsre pasre aspre sapre psare spare arspe raspe asrpe sarpe rsape srape prsae rpsae psrae sprae rspae srpae aersp earsp aresp raesp erasp reasp aesrp easrp aserp saerp esarp searp arsep rasep asrep sarep rsaep sraep ersap resap esrap serap rseap sreap persa eprsa presa rpesa erpsa repsa pesra epsra psera spera espra sepra prsea rpsea psrea sprea rspea srpea erspa respa esrpa serpa rsepa srepa
Note: these 'words' (valid or invalid) are all the permutations of the word apers. These words are obtained by scrambling the letters in apers.