_____________              _____________              _____________
|             |            |             |            |             |
|     401     |    <-->    |     911     |    <---    |     829     |
|_____________|            |_____________|            |_____________|

                            nr__n_(t_v___n_n --> 
          
       nr_fr___p_g_s -->  n
r__ll_(_b_t(h -->  0 
-->  26739
 -->  nr__(
t_v___n_n -->  388618