public class Test {
    public static void main(String[] args) {
	BinaryTree<String> root = new BinaryTree<>("William");
	BinaryTree<String> mom = new BinaryTree<>("Diana");
	BinaryTree<String> dad = new BinaryTree<>("Charles");
	BinaryTree<String> mgm = new BinaryTree<>("Frances");
	BinaryTree<String> mgf = new BinaryTree<>("Edward");
	BinaryTree<String> fgm = new BinaryTree<>("Elizabeth");
	BinaryTree<String> fgf = new BinaryTree<>("Philip");
	
	root.setLeft(mom);
	root.setRight(dad);
	mom.setLeft(mgm);
	mom.setRight(mgf);
	dad.setLeft(fgm);
	dad.setRight(fgf);

	// Use the instance method definition
	System.out.println(root.getHeight());
	// Use the static method definition
	System.out.println(BinaryTree.getHeight(root));
    }
}