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