loper olper lpoer ploer opler poler loepr olepr leopr elopr oelpr eolpr lpeor pleor lepor elpor pelor eplor opelr poelr oeplr eoplr peolr epolr lopre olpre lpore plore oplre polre lorpe olrpe lrope rlope orlpe rolpe lproe plroe lrpoe rlpoe prloe rploe oprle porle orple rople prole rpole loerp olerp leorp elorp oelrp eolrp lorep olrep lroep rloep orlep rolep lerop elrop lreop rleop erlop relop oerlp eorlp orelp roelp erolp reolp lpero plero lepro elpro pelro eplro lpreo plreo lrpeo rlpeo prleo rpleo lerpo elrpo lrepo rlepo erlpo relpo perlo eprlo prelo rpelo erplo replo operl poerl oeprl eoprl peorl eporl oprel porel orpel ropel proel rpoel oerpl eorpl orepl roepl eropl reopl perol eprol preol rpeol erpol repol
Note: these 'words' (valid or invalid) are all the permutations of the word loper. These words are obtained by scrambling the letters in loper.