Small sphenofrustary trishecatonicosachoron

The small sphenofrustary trishecatonicosachoron, or swifthi, is a nonconvex uniform polychoron that consists of 120 great dodecicosidodecahedra, 120 small ditrigonal dodecicosidodecahedra, and 120 icosidodecatruncated icosidodecahedra. Two great dodecicosidodecahedra, two small ditrigonal 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.