A sampling of configurations above their locations in the compact 𝒞 ̅ 2 AB2 L-2 Π 𝑢 -mode configuration space is also shown in Fig. . Examination of this space reveals that there are five regions of contiguous generic symmetry as shown in Fig. . At the poles are the two orientation permutations of the L-2 polytope (𝐷 ∞ℎ generic symmetry). The equator represents a 1D continuum of 2F-2 polytopes (𝐶 ∞𝑣 generic symmetry). Between the equator and the poles are two regions of A-2 polytopes (𝐶 2𝑣 generic symmetry).