nobho onbho nboho bnoho obnho bonho nohbo onhbo nhobo hnobo ohnbo honbo nbhoo bnhoo nhboo hnboo bhnoo hbnoo obhno bohno ohbno hobno bhono hbono noboh onboh nbooh bnooh obnoh bonoh noobh onobh noobh onobh oonbh oonbh nbooh bnooh noboh onboh bonoh obnoh obonh boonh oobnh oobnh boonh obonh nohob onhob nhoob hnoob ohnob honob noohb onohb noohb onohb oonhb oonhb nhoob hnoob nohob onhob honob ohnob ohonb hoonb oohnb oohnb hoonb ohonb nbhoo bnhoo nhboo hnboo bhnoo hbnoo nboho bnoho nobho onbho bonho obnho nhobo hnobo nohbo onhbo honbo ohnbo bhono hbono bohno obhno hobno ohbno obhon bohon ohbon hobon bhoon hboon obohn boohn oobhn oobhn boohn obohn ohobn hoobn oohbn oohbn hoobn ohobn bhoon hboon bohon obhon hobon ohbon
Note: these 'words' (valid or invalid) are all the permutations of the word nobho. These words are obtained by scrambling the letters in nobho.