Point groups in three dimensions the finite subgroups of SO(3), are: the cyclic groups "C" (the rotation group of a canonical pyramid), the dihedral groups "D" (the rotation group of a uniform prism, or canonical bipyramid), and the rotation groups "T", "O" and "I" of a regular tetrahedron, octahedron/cube and icosahedron/dodecahedron. In particular, the dihedral groups "D", "D" etc. are the rotation groups of plane regular polygons embedded in three-dimensional space, and such a figure may be considered as a degenerate regular prism. Therefore, it is also called a "dihedron" (Greek: solid with two faces), which explains the name "dihedral group". The rotation group of
Angels with Dirty Faces short spoofing their "cycle" of crime films; the cartoon's title, "Thugs with Dirty Mugs", is a direct pun on "Angels with Dirty Faces". In the early 1990s, parodies appeared in the form of films within a film in "Home Alone" and its sequel, "". These parodies are called "Angels with Filthy Souls" and "Angels with Even Filthier Souls". In an episode of "Sesame Street", a segment entitled "Monsters with Dirty Faces" features "Officer Grover showing a gang leader named Rocky how to effectively wash his face." Furthermore, the film's plot inspired an episode of "" called "It's Never Too Late".