_____________              _____________              _____________          _____
|             |            |             |            |             |        |     |
|     636     |    --->    |     166     |    <---    |     632     |        |  K  |
|_____________|            |_____________|            |_____________|        |_____|

                     430611 -->  n
r_fr[(nn)(nn)
           
                                         _p[a]g(nn)]s