mesh 
  rectilinear 
    nx = 10 
    ny = 10 
    nz = 10 
    bx = 4 
    by = 7 
    bz = 5 
    gmin = 1.0 1.0 1.0 
    gmax = 4.0 7.0 5.0 
  end 
  set assign 
    nodeset,ihi,2 
    nodeset,jhi,1 
  end 
end

