This model introduces a rest particle and allows the
particles to collide according to the following rules [8]:
the five FHP-I
collisions, type (a) and (b); six rest particle creation collisions
, type (c); six rest particle destruction collisions, type (d) and also
the five FHP-I rules with a spectator rest particle, an example of which
is collision (e). This gives 22 possible interactions out of a possible
total of 128.