struct time {
    int hours;
    int minutes;
    int seconds;
    vector <int> marks;
};

bool time_compare(const time& first_time, const time& second_time) {
    if (first_time.hours != second_time.hours) {
        return first_time.hours < second_time.hours;
    }
    else {
        if (first_time.minutes != second_time.minutes) {
            return first_time.minutes < second_time.minutes;
        }
        else {
            if (first_time.seconds != second_time.seconds) {
                return first_time.seconds < second_time.seconds;
            }
        }
    }
}

void task3() {
    int n;
    cin >> n;
    vector <time> time_moments(n);
    for (int i = 0; i < n; i++) {
        time current_time;
        int current_hours, current_minutes, current_seconds;
        cin >> current_hours >> current_minutes >> current_seconds;
        current_time.hours = current_hours;
        current_time.minutes = current_minutes;
        current_time.seconds = current_seconds;
        time_moments[i] = current_time;
    }
    stable_sort(time_moments.begin(), time_moments.end(), time_compare);
    for (auto current_time : time_moments) {
        cout << current_time.hours << " " << current_time.minutes << " " << current_time.seconds << endl;
    }
}