int main() {
    std::map <std::string, std::vector<std::string>> buses; //key - bus, value - stops
    std::map <std::string, std::vector<std::string>> stops; //key - stop, value - buses

    int Q = 0;
    std::cin >> Q;

    for (int i = 0; i < Q; ++i){
        std::string command;
        std::cin >> command;
        if (command == "NEW_BUS"){
            NewBus(buses, stops);
        } else if (command == "BUSES_FOR_STOP"){
            string s;
            std::cin >> s;
            BusesForStop(s, stops);
        } else if (command == "STOPS_FOR_BUS"){
            std::string s;
            std::cin >> s;
            StopsForBus(s, buses, stops);
        } else if (command == "ALL_BUSES"){
            AllBuses(buses);
        }
    }
    return 0;
}