a) Optimal density profile of neutrons n_n and protons n_p for rod shapes at average baryon density n_b = 0.076 fm^-3. The associated baryon and proton numbers, proton fraction x_p = Z/A in percentage, and radius of the cell are shown. The vertical dashed line marks the location of the end of the WS cell. b) The same for slab shapes. c) The same for tube shapes. d) The same for bubble shapes. We note that the scale on the horizontal axis is the same in Figs. 9c and a, and in Figs. 9d and 8c.