lower olwer lwoer wloer owler woler loewr olewr leowr elowr oelwr eolwr lweor wleor lewor elwor welor ewlor owelr woelr oewlr eowlr weolr ewolr lowre olwre lwore wlore owlre wolre lorwe olrwe lrowe rlowe orlwe rolwe lwroe wlroe lrwoe rlwoe wrloe rwloe owrle worle orwle rowle wrole rwole loerw olerw leorw elorw oelrw eolrw lorew olrew lroew rloew orlew rolew lerow elrow lreow rleow erlow relow oerlw eorlw orelw roelw erolw reolw lwero wlero lewro elwro welro ewlro lwreo wlreo lrweo rlweo wrleo rwleo lerwo elrwo lrewo rlewo erlwo relwo werlo ewrlo wrelo rwelo erwlo rewlo owerl woerl oewrl eowrl weorl eworl owrel worel orwel rowel wroel rwoel oerwl eorwl orewl roewl erowl reowl werol ewrol wreol rweol erwol rewol
Note: these 'words' (valid or invalid) are all the permutations of the word lower. These words are obtained by scrambling the letters in lower.