Green's rules

Green's rules are a procedure for generating $n$-$n$-3 acrohedra. The rules are based off of Mason Green's construction of a 7-7-3 acrohedron, the small supersemicupola.

Procedure
The procedure can be described as follows:


 * 1) Start with a virtual $n$-gon.
 * 2) For each edge in the starting polygon, attach both an $n$-gon and a triangle.
 * 3) Attach the first open edge on each side of each $n$-gon to the first open edge of the adjacent triangle.
 * 4) Attach the next open edge of each $n$-gon to the adjacent $n$-gon.
 * 5) Attach $n$ new triangles to the next open edges of the $n$-gons.
 * 6) If the remaining open edges can be closed with a regular polygon or regular polygon compound close it, otherwise return to step 4.