borer obrer broer rboer orber rober boerr oberr beorr eborr oebrr eobrr breor rbeor beror ebror rebor erbor orebr roebr oerbr eorbr reobr erobr borre obrre brore rbore orbre robre borre obrre brore rbore orbre robre brroe rbroe brroe rbroe rrboe rrboe orrbe rorbe orrbe rorbe rrobe rrobe boerr oberr beorr eborr oebrr eobrr borer obrer broer rboer orber rober beror ebror breor rbeor erbor rebor oerbr eorbr orebr roebr erobr reobr brero rbero berro ebrro rebro erbro brreo rbreo brreo rbreo rrbeo rrbeo berro ebrro brero rbero erbro rebro rerbo errbo rrebo rrebo errbo rerbo orerb roerb oerrb eorrb reorb erorb orreb roreb orreb roreb rroeb rroeb oerrb eorrb orerb roerb erorb reorb rerob errob rreob rreob errob rerob
Note: these 'words' (valid or invalid) are all the permutations of the word borer. These words are obtained by scrambling the letters in borer.