A section has three vertices. Most of the rest are

eight

+

2

=

10 vertices, small pieces are

four

individual

2. Through the vertex and two chamfers

This part is still three vertices, and most of the rest are

eight

+

1

=

9 vertices, the small piece is

four

individual

3. Through two vertices and a chamfer

This part is still three vertices, and most of the rest are

eight

A vertex, a small piece is

four

individual

Step 4 cross three vertices

There are three parts, and the rest are still

four

A small piece is

four

individual