Which leaf nodes are not explored when you apply alpha$-$beta pruning for the following Game Tree.

G$,$ H$,$ I, J$,$ M$,$ N

D$,$ G$,$ H$,$ I, J$,$ N

B$,$ C$,$ D$,$ I, J$,$ N

C$,$ D$,$ G$,$ H$,$ M$,$ N