The ccm select -intersection command pops
the last pushed entry on the selection set. This action sets the current
selection set to the intersection of its previous objects and the
popped selection set. For example, if the top of the stack contains
objects {a,b,c} and the current selection set contains {b,c,d}, then
the current selection set after the command is {b,c,}.
About this task
ccm select -int|-intersection