boonl obonl boonl obonl oobnl oobnl bonol obnol bnool nbool onbol nobol bonol obnol bnool nbool onbol nobol oonbl oonbl onobl noobl onobl noobl booln oboln booln oboln oobln oobln bolon oblon bloon lboon olbon lobon bolon oblon bloon lboon olbon lobon oolbn oolbn olobn loobn olobn loobn bonlo obnlo bnolo nbolo onblo noblo bolno oblno blono lbono olbno lobno bnloo nbloo blnoo lbnoo nlboo lnboo onlbo nolbo olnbo lonbo nlobo lnobo bonlo obnlo bnolo nbolo onblo noblo bolno oblno blono lbono olbno lobno bnloo nbloo blnoo lbnoo nlboo lnboo onlbo nolbo olnbo lonbo nlobo lnobo oonlb oonlb onolb noolb onolb noolb oolnb oolnb olonb loonb olonb loonb onlob nolob olnob lonob nloob lnoob onlob nolob olnob lonob nloob lnoob
Note: these 'words' (valid or invalid) are all the permutations of the word boonl. These words are obtained by scrambling the letters in boonl.