从空二开始，严格按照二叉搜索树的插入算法（不进行旋转平衡），逐个插入关键码{15, 82, 10, 4, 55, 89, 29, 45, 54, 35, 25}构造出一颗二叉搜索树，对该二叉搜索树按照后序遍历得到的序列为（每两个元素之间用一个空格隔开）Given a null binary tree, insert key values {15, 82, 10, 4, 55, 89, 29, 45, 54, 35, 25} successively according to the insertion algorithm of a binary search tree strictly (no rotation and balance) to construct a binary search tree. Please write down the sequence of post order of this binary search tree. (There is one blank space between two elements)