poptr opptr ppotr ppotr opptr poptr potpr optpr ptopr tpopr otppr toppr pptor pptor ptpor tppor ptpor tppor optpr potpr otppr toppr ptopr tpopr poprt opprt pport pport opprt poprt porpt oprpt propt rpopt orppt roppt pprot pprot prpot rppot prpot rppot oprpt porpt orppt roppt propt rpopt potrp optrp ptorp tporp otprp toprp portp oprtp protp rpotp orptp roptp ptrop tprop prtop rptop trpop rtpop otrpp torpp ortpp rotpp tropp rtopp pptro pptro ptpro tppro ptpro tppro pprto pprto prpto rppto prpto rppto ptrpo tprpo prtpo rptpo trppo rtppo ptrpo tprpo prtpo rptpo trppo rtppo optrp potrp otprp toprp ptorp tporp oprtp portp orptp roptp protp rpotp otrpp torpp ortpp rotpp tropp rtopp ptrop tprop prtop rptop trpop rtpop
Note: these 'words' (valid or invalid) are all the permutations of the word poptr. These words are obtained by scrambling the letters in poptr.