oller loler oller loler lloer lloer olelr loelr oellr eollr leolr elolr olelr loelr oellr eollr leolr elolr lleor lleor lelor ellor lelor ellor ollre lolre ollre lolre llore llore olrle lorle orlle rolle lrole rlole olrle lorle orlle rolle lrole rlole llroe llroe lrloe rlloe lrloe rlloe olerl loerl oelrl eolrl leorl elorl olrel lorel orlel rolel lroel rloel oerll eorll orell roell eroll reoll lerol elrol lreol rleol erlol relol olerl loerl oelrl eolrl leorl elorl olrel lorel orlel rolel lroel rloel oerll eorll orell roell eroll reoll lerol elrol lreol rleol erlol relol llero llero lelro ellro lelro ellro llreo llreo lrleo rlleo lrleo rlleo lerlo elrlo lrelo rlelo erllo rello lerlo elrlo lrelo rlelo erllo rello
Note: these 'words' (valid or invalid) are all the permutations of the word oller. These words are obtained by scrambling the letters in oller.