__author__ = 'Murtaza'
class BinaryTreeNode:
    def __init__(self, data):
        self.data = data
        self.left = None
        self.right = None

    def get_data(self):
        return self.data

    def set_left(self, left):
        self.left = left

    def set_right(self, right):
        self.right = right

    def get_left(self):
        return self.left

    def get_right(self):
        return self.right