Hi
You remembered the single selection using the remember action, let's say under the name mysels.
In your lay trigger:
global user variables mysels are set
and selections name is equal to "mysels_1_sel_name"
AND
selections trigger expression FIND("3.","mysels_1_sel_name") is greater than 0
or selections trigger expression FIND("6.","mysels_1_sel_name") is greater than 0