prier rpier pirer iprer riper irper preir rpeir perir eprir repir erpir pierr iperr peirr epirr ieprr eiprr riepr irepr reipr eripr ierpr eirpr prire rpire pirre iprre ripre irpre prrie rprie prrie rprie rrpie rrpie pirre iprre prire rpire irpre ripre rirpe irrpe rripe rripe irrpe rirpe preri rperi perri eprri repri erpri prrei rprei prrei rprei rrpei rrpei perri eprri preri rperi erpri repri rerpi errpi rrepi rrepi errpi rerpi pierr iperr peirr epirr ieprr eiprr pirer iprer prier rpier irper riper perir eprir preir rpeir erpir repir ierpr eirpr irepr riepr eripr reipr rierp irerp reirp erirp ierrp eirrp rirep irrep rriep rriep irrep rirep rerip errip rreip rreip errip rerip ierrp eirrp irerp rierp erirp reirp
Note: these 'words' (valid or invalid) are all the permutations of the word prier. These words are obtained by scrambling the letters in prier.