           @    @    @    @    @    @    @    @    @

  n   n   n   n   n   n   n   n   n   n   n   n   n   n   n   n
  f    f    f    f    f    f    f    f    f    f    f    f    f
  e   e   e   e   e   e   e   e   e   e   e   e   e   e   e   e
  a    a    a    a    a    a    a    a    a    a    a    a    a
  a   a   a   a   a   a   a   a   a   a   a   a   a   a   a   a
  r    r    r    r    r    r    r    r    r    r    r    r    r
  r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r
