PSL(2,7) permutes the octads internally, in parallel. Thus, each Weyl group element permutes the Weyl chambers. S permutes the 3 octads bodily. A "C" rotation operation permutes the two hydrogen atoms and the two chlorine atoms. Many window managers have a setting that permutes the assignment. Every deck transformation permutes the elements of each fiber. Assume Heap's Algorithm permutes an array of size . It permutes the six faces of the cube. A group in which every subgroup permutes is called an Iwasawa group. The group of its projectivities is then the group that permutes conics.