  For a simple algebraic group $G$ over an algebraically closed field, we study
products of normal subsets. For this we mark the nodes of the Dynkin diagram of
$G$. We use two types of labels, a binary marking and a labeling with
non-negative integers. The first is used to recognize large conjugacy classes
which appear in a product of two conjugacy classes while the second is used to
keep track of multiplicities of regular diagrams. In particular, we formulate
sufficient conditions in terms of marked diagrams, for a product of normal
subsets in $G$ to contain regular semisimple elements.
