public class TreeNode<E>{
	private E value;
	private TreeNode<E> left;
	private TreeNode<E> right;
	private TreeNode<E> parent;

	public TreeNode(E v, TreeNode<E> l, TreeNode<E> r, TreeNode<E> p){
		value = v; left = l; right = r; parent = p;
	}

	public E getValue(){ return value; }
	public TreeNode<E> getLeft(){ return left; }
	public TreeNode<E> getRight(){ return right; }
	public TreeNode<E> getParent(){ return parent; }

	public void setValue(E v){ value = v; }
	public void setLeft(TreeNode<E> l){ left = l; }
	public void setRight(TreeNode<E> r){ right = r; }
	public void setParent(TreeNode<E> p){ parent = p; }
}