#include <iostream>
 
using namespace std;
 
class String {
 
    public:
 
      friend String operator+(const String & l, const String & r);
 
 String(){}
 
 String operator+(const String & lhs)
{
cout << "member" << endl;
}
 };
 
String operator+(const String & l, const String & r)
{
     cout << "friend" << endl;
}
 
ostream & operator<<(ostream & os, const String & s)
{
   return cout << "cout" << endl;
}
 
int main()
{
  String one;
 
  cout <<(one + one)<<endl;
}

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