

class node:
    def __init__(self, label, left, right, parent):
        self.label = label
        self.left = left #optional node
        self.right = right  #optional node
        self.parent = parent #optional node


e8218bda65a208c22fd2bdd404c40cee0a98f366
<mask token>

class node:
    <mask token>

class node:

    def __init__(self, label, left, right, parent):
        self.label = label
        self.left = left
        self.right = right
        self.parent = parent



class node:
    def __init__(self, label, left, right, parent):
        self.label = label
        self.left = left #optional node
        self.right = right  #optional node
        self.parent = parent #optional node

