rebar erbar rbear brear ebrar berar reabr erabr raebr arebr earbr aerbr rbaer braer raber arber barer abrer ebarr bearr eabrr aebrr baerr aberr rebra erbra rbera brera ebrra berra rerba errba rreba rreba errba rerba rbrea brrea rrbea rrbea brrea rbrea ebrra berra erbra rebra brera rbera rearb erarb raerb arerb earrb aerrb rerab errab rreab rreab errab rerab rareb arreb rraeb rraeb arreb rareb earrb aerrb erarb rearb arerb raerb rbare brare rabre arbre barre abrre rbrae brrae rrbae rrbae brrae rbrae rarbe arrbe rrabe rrabe arrbe rarbe barre abrre brare rbare arbre rabre ebarr bearr eabrr aebrr baerr aberr ebrar berar erbar rebar brear rbear earbr aerbr erabr reabr arebr raebr barer abrer braer rbaer arber raber
Note: these 'words' (valid or invalid) are all the permutations of the word rebar. These words are obtained by scrambling the letters in rebar.