ryper yrper rpyer pryer yprer pyrer ryepr yrepr reypr erypr yerpr eyrpr rpeyr preyr repyr erpyr peryr epryr yperr pyerr yeprr eyprr peyrr epyrr rypre yrpre rpyre pryre yprre pyrre ryrpe yrrpe rrype rrype yrrpe ryrpe rprye prrye rrpye rrpye prrye rprye yprre pyrre yrpre rypre pryre rpyre ryerp yrerp reyrp eryrp yerrp eyrrp ryrep yrrep rryep rryep yrrep ryrep reryp erryp rreyp rreyp erryp reryp yerrp eyrrp yrerp ryerp eryrp reyrp rpery prery repry erpry perry eprry rprey prrey rrpey rrpey prrey rprey rerpy errpy rrepy rrepy errpy rerpy perry eprry prery rpery erpry repry yperr pyerr yeprr eyprr peyrr epyrr yprer pyrer yrper ryper pryer rpyer yerpr eyrpr yrepr ryepr erypr reypr peryr epryr preyr rpeyr erpyr repyr
Note: these 'words' (valid or invalid) are all the permutations of the word ryper. These words are obtained by scrambling the letters in ryper.