And (v7, v9, v8), (v9, v8, v6), (v4, v2, v1), (v2, v1, v3) are the groups divided into groups according to certain principles at the end of the two virtual lines.
(v7, v9, v8), (v9, v8, v6), (v4, v2, v1), (v2, v1, v3) are groups divided according to certain principles at the end of the two virtual line connections.