The 4-dimensional affine Coxeter group, , [31,1,1,1], has four order-3 branches, and can express one honeycomb, 1111, , represents a lower symmetry form of the 16-cell honeycomb, and 01111,  for the rectified 16-cell honeycomb.
The 4-dimensional affine Coxeter group, , [31,1,1,1], has four order-3 branches, and can be used to describe a particular type of honeycomb structure, 1111, , which is a less complex version of the 16-cell honeycomb, while 01111,  represents another form of the rectified 16-cell honeycomb.