iepwr eipwr ipewr piewr epiwr peiwr iewpr eiwpr iwepr wiepr ewipr weipr ipwer piwer iwper wiper pwier wpier epwir pewir ewpir wepir pweir wpeir ieprw eiprw iperw pierw epirw peirw ierpw eirpw irepw riepw eripw reipw iprew pirew irpew ripew priew rpiew epriw periw erpiw repiw preiw rpeiw iewrp eiwrp iwerp wierp ewirp weirp ierwp eirwp irewp riewp eriwp reiwp iwrep wirep irwep riwep wriep rwiep ewrip werip erwip rewip wreip rweip ipwre piwre iwpre wipre pwire wpire iprwe pirwe irpwe ripwe priwe rpiwe iwrpe wirpe irwpe riwpe wripe rwipe pwrie wprie prwie rpwie wrpie rwpie epwri pewri ewpri wepri pweri wperi eprwi perwi erpwi repwi prewi rpewi ewrpi werpi erwpi rewpi wrepi rwepi pwrei wprei prwei rpwei wrpei rwpei
Note: these 'words' (valid or invalid) are all the permutations of the word iepwr. These words are obtained by scrambling the letters in iepwr.