Drag drop - correct/incorrect targets

What I am trying to do is have 10 draggable items, 1 target area and a button to check if the correct draggable items have been dragged onto the target.

For example - 10 drinks… of which some are alcoholic and some are not. The user has to drag the just the alcoholic ones to the target. If correct, the button will call a correct message to display. If not, an incorrect message will display.

I can make the draggable items and the targets but I’m struggling with how to check if the correct items have been placed on the target and displaying a corresponding message. Any help would be greatly appreciated!