#include <iostream>
#include<string>
//#include <queue>
using namespace std;
class BinaryTree;
class BinTreeNode{
friend class BinaryTree;
private :
char data;
BinTreeNode *lChild,*rChild;
public:
BinTreeNode()
{
data=NULL;
lChild=NULL;
rChild=NULL;
}
BinTreeNode(char value,BinTreeNode *lChild1=NULL,BinTreeNode *rChild1=NULL)
{
data=value;
lChild=lChild1;
rChild=rChild1;
}
};
class BinaryTree{
public:
BinTreeNode *root;
BinaryTree()
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