Small sphenoretrofrustary trishecatonicosachoron

The small sphenoretrofrustary trishecatonicosachoron, or swirfthi, is a nonconvex uniform polychoron that consists of 120 great ditrigonal dodecicosidodecahedra, 120 small dodecicosidodecahedra, and 120 icosidodecatruncated icosidodecahedra. Two great ditrigonal dodecicosidodecahedra, two small dodecicosidodecahedra, and four icosidodecatruncated icosidodecahedra join at each vertex.

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