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# Definition for a binary tree node.
# class TreeNode:
# def __init__(self, val=0, left=None, right=None):
# self.val = val
# self.left = left
# self.right = right
class Solution:
def deleteNode(self, root: TreeNode, key: int) -> TreeNode:
def deleter(node: TreeNode, key: int):
if not node: