#include <iostream>
class Baseball{
private:
    int score,out,runner,inning;
public:
    Baseball();
    ~Baseball()=default;
    void checkEvent(std::string event);
    void hit();
    void homerun();
    void countOut();
    int getInning();
};

Baseball::Baseball(){
    score=0,out=0,runner=0,inning=0;
}

void Baseball::checkEvent(std::string event){
    if(event=="HIT"){
        this->hit();
    }
    else if(event=="OUT"){
        this->countOut();
    }
    else if(event=="HOMERUN"){
        this->homerun();
    }
}

void Baseball::hit(){
    runner<3?++runner:++score;
}
	
void Baseball::countOut(){
    if(out<2){
        ++out;
    }
    else{
	std::cout << score << std::endl;
	runner=0,out=0,score=0;++inning;
    }
}
	
void Baseball::homerun(){
    score+=runner+1;
    runner=0;
}	

int Baseball::getInning(){
    return inning;
}

int main() {
    Baseball game;
    int num;
    std::cin >> num;
    while(game.getInning()<num){
        std::string event;
	std::cin >> event;
	game.checkEvent(event);
    }
    return 0;
}