_____________              _____________              _____________
|             |            |             |            |             |
|     174     |    <-->    |     251     |    ....    |     913     |
|_____________|            |_____________|            |_____________|

nr__ct_v___n_n.......-->0.......-->nr__n_ct_v__f_l_.......-->97......
.-->437798.......-->nr__n_ct_v___n_n.......-->66.......-->nr_fr___p_g
_s.......-->nr__ll_c_b_tch