   mesh
   brick
    numx 2 initial radius 10.
      xblock 1 2. interval 12
      xblock 2 2. interval 12
    numy 2
      yblock 1 2. interval 12
      yblock 2 2. interval 12
    end
   set assign
$      block nodeset, jlo, 1 1
$      block sideset, jlo, 1 1
    end

   topology modification
    suppress block, 1
    suppress block, 4
    end

  end

