Small small dishecatonicosachoron

The small small dishecatonicosachoron, or sisady, is a nonconvex uniform polychoron that consists of 120 great dodecicosahedra and 120 icosidodecatruncated icosidodecahedra. Two great dodecicosahedra and four icosidodecatruncated icosidodecahedra join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the small sphenoverted ditrigonal trishecatonicosachoron.