Manipulate data between enumerated variables and set of in Delphi

I have two variables of different types, but dependent, one type being set of of the other type which is a Enumerated Types . How do I extract the value of the variable of type set of (Y in my case below) and assign it to the variable of the enumerated type "X"? In my example, X would have to be equal to "bcA", obligatorily using the "Y" to extract the value. NOTE: Programming in Delphi 10 with Android.

type
   TBaseCom_MODES = (bcA = 0, bcB = 1, bcN = 100);
   TBaseCom_MODES_Set = set of TBaseCom_MODES;

var X: TBaseCom_MODES;
    Y: TBaseCom_MODES_Set;
begin

   Y := [bcA, bcN];

   X := Y - [bcN]; // Aqui não funciona. Dá erro

end;