Small tesseractitesseractihexadecachoron

The small tesseractitesseractihexadecachoron, or steth, is a nonconvex uniform polychoron that consists of 16 regular tetrahedra, 8 cubes, and 8 small cubicuboctahedra. 1 tetrahedron, 1 cube, and 3 small cubicuboctahedra join at each vertex.

It is in the same regiment as the small disprismatotesseractihexadecachoron.