#include <iostream>
using namespace std;


struct Peka {
	Peka operator()() {
		std::cout << "peka" << std::endl;
		return Peka();
	}
	
};

struct Yoba {
Peka operator()() {
	std::cout << "yoba" << std::endl;
	return Peka();	
}
};

int main() {
	Yoba yoba;
	yoba()();
	// your code goes here
	return 0;
}