relur erlur rleur lreur elrur lerur reulr erulr ruelr urelr eurlr uerlr rluer lruer ruler urler lurer ulrer elurr leurr eulrr uelrr luerr ulerr relru erlru rleru lreru elrru lerru rerlu errlu rrelu rrelu errlu rerlu rlreu lrreu rrleu rrleu lrreu rlreu elrru lerru erlru relru lreru rleru reurl erurl ruerl urerl eurrl uerrl rerul errul rreul rreul errul rerul rurel urrel rruel rruel urrel rurel eurrl uerrl erurl reurl urerl ruerl rlure lrure rulre urlre lurre ulrre rlrue lrrue rrlue rrlue lrrue rlrue rurle urrle rrule rrule urrle rurle lurre ulrre lrure rlure urlre rulre elurr leurr eulrr uelrr luerr ulerr elrur lerur erlur relur lreur rleur eurlr uerlr erulr reulr urelr ruelr lurer ulrer lruer rluer urler ruler
Note: these 'words' (valid or invalid) are all the permutations of the word relur. These words are obtained by scrambling the letters in relur.