brier rbier birer ibrer riber irber breir rbeir berir ebrir rebir erbir bierr iberr beirr ebirr iebrr eibrr riebr irebr reibr eribr ierbr eirbr brire rbire birre ibrre ribre irbre brrie rbrie brrie rbrie rrbie rrbie birre ibrre brire rbire irbre ribre rirbe irrbe rribe rribe irrbe rirbe breri rberi berri ebrri rebri erbri brrei rbrei brrei rbrei rrbei rrbei berri ebrri breri rberi erbri rebri rerbi errbi rrebi rrebi errbi rerbi bierr iberr beirr ebirr iebrr eibrr birer ibrer brier rbier irber riber berir ebrir breir rbeir erbir rebir ierbr eirbr irebr riebr eribr reibr rierb irerb reirb erirb ierrb eirrb rireb irreb rrieb rrieb irreb rireb rerib errib rreib rreib errib rerib ierrb eirrb irerb rierb erirb reirb
Note: these 'words' (valid or invalid) are all the permutations of the word brier. These words are obtained by scrambling the letters in brier.