#include <iostream>

using namespace std;

class Person {
public:
    Person(const string& first_name, const string& last_name) : first_name_(first_name), last_name_(last_name) {}
    const string& get_first_name() const {
      return first_name_;
    }
    const string& get_last_name() const {
      return last_name_;
    }
private:
    string first_name_;
    string last_name_;
};
// Enter your code here.
ostream& operator<<(ostream& os, const Person& p) {
    os << "first_name=" + p.get_first_name() + ",last_name=" + p.get_last_name();
    return os;
}

int main() {
    string first_name, last_name, event;
    cin >> first_name >> last_name >> event;
    auto p = Person(first_name, last_name);
    cout << p << " " << event << endl;
    return 0;
}

// << operator overloading
ostream& operator << ( ostream& out , const Person& person)
{
    out << "first_name=" << person.get_first_name() 
        << ",last_name=" << person.get_last_name();   
    
		return out;
}

std::ostream& operator<< (std::ostream& ost, const Person& person)
{
	auto str = std::format("first_name={},last_name={} ",person.get_first_name(),person.get_last_name());
	ost << str;
	return ost;
}

ostream& operator<<(ostream& os, const Person& p) {
    os << "first_name=" << p.get_first_name() << ",last_name=" << p.get_last_name();
    return os;
}

ostream& operator<<(ostream& out,const Person& pers){
    out<<"first_name="<<pers.get_first_name()<<","<<"last_name="<<pers.get_last_name();
    return out;
}