class Message {
    std::string value;
    long long position;
public: 
    Message() {
        static long long _global_order = 0;
        this->position = _global_order;
        _global_order++;
    }
    const string& get_text() {
        return this->value;
    }
    void set_text(const string& text) {
        this->value = std::string(text);    
    }
    bool operator < (const Message& other){
        return this->position < other.position;
    }
};

class MessageFactory {
public:
    MessageFactory() {}
    Message create_message(const string& text) {
        Message msg;
        msg.set_text(text);
        return msg;
    }
};