class BinaryNode:
    def __init__(self, value):
        self.value = value
        self.left = None
        self.right = None

root = BinaryNode(8)
root.left = BinaryNode(3)
root.right = BinaryNode(10)
root.left.left = BinaryNode(1)
root.left.right = BinaryNode(6)

print(root.value)              # 8
print(root.left.value)         # 3
print(root.left.right.value)   # 6