Small spinoretrofrustary trishecatonicosachoron

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

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the antifrustary hexacositrishecatonicosachoron.