Fig. 6

(a) \(G/O_{1i}: i \in \mathbb {N}_{m}\); (b) \(G/O_{2i}: i \in \mathbb {N}_{n-m}\); (c) \(G/V_i: i \in \mathbb {N}_{2n-1}\); (d) \(G/H_i: i \in \mathbb {N}_{2m-1}\).

(a) \(G/O_{1i}: i \in \mathbb {N}_{m}\); (b) \(G/O_{2i}: i \in \mathbb {N}_{n-m}\); (c) \(G/V_i: i \in \mathbb {N}_{2n-1}\); (d) \(G/H_i: i \in \mathbb {N}_{2m-1}\).