arrob rarob arrob rarob rraob rraob arorb raorb aorrb oarrb roarb orarb arorb raorb aorrb oarrb roarb orarb rroab rroab rorab orrab rorab orrab arrbo rarbo arrbo rarbo rrabo rrabo arbro rabro abrro barro rbaro braro arbro rabro abrro barro rbaro braro rrbao rrbao rbrao brrao rbrao brrao arobr raobr aorbr oarbr roabr orabr arbor rabor abror baror rbaor braor aobrr oabrr aborr baorr obarr boarr robar orbar rboar broar obrar borar arobr raobr aorbr oarbr roabr orabr arbor rabor abror baror rbaor braor aobrr oabrr aborr baorr obarr boarr robar orbar rboar broar obrar borar rroba rroba rorba orrba rorba orrba rrboa rrboa rbroa brroa rbroa brroa robra orbra rbora brora obrra borra robra orbra rbora brora obrra borra
Note: these 'words' (valid or invalid) are all the permutations of the word arrob. These words are obtained by scrambling the letters in arrob.