vorbestellt, postorder Java

				1
		2				3
4			 5

//(a) Inorder (Left, Root, Right) : 4 2 5 1 3 
//(b) Preorder (Root, Left, Right) : 1 2 4 5 3 
//(c) Postorder (Left, Right, Root) : 4 5 2 3 1
Magnificent Monkey Adi