   mesh
   brick
    numz 1
      zblock 1 10.0 interval 6
    numx 3 initial radius 10.
      xblock 1 2. interval 12
      xblock 2 5. interval 6
      xblock 3 5. interval 12
    numy 2
      yblock 1 18. interval 18
      yblock 2 18. interval 18
    end
   set assign
      block sideset, klo, 33 4
      block sideset, khi, 33 4
        sideset,ihi,30
        sideset,ilo,30
      nodeset,ihi,20
      nodeset,ilo,20
      block nodeset, klo, 22 4
      block nodeset, khi, 22 4
    end
  end

