#include <map>
#include <string>
#include <vector>
#include <algorithm>
#include <exception>
#include <set>
#include <iostream>
#include <sstream>
#include <iomanip>

using namespace std;

int CountDash(istream& f) {
	int c = 0;
	while (f.peek() == '-') {
		char h;
		f >> h;
		++c;
	}
	for (int i = 0; i<c; i++) {
		f.unget();
	}
	return c;
}

class Date {
public:
	Date(int& i, int& k, int& m) {
		year = i;
		month = k;
		day = m;

		if ((m > 31) || (m <= 0)) {
			if ((k > 12) || (k <= 0)) throw invalid_argument("Month value is invalid: " + to_string(k));
			else throw invalid_argument("Day value is invalid: " + to_string(m));
		}
		else if ((k > 12) || (k <= 0)) throw invalid_argument("Month value is invalid: " + to_string(k));
	}

	int GetYear() const {
		return year;
	};
	int GetMonth() const {
		return month;
	};
	int GetDay() const {
		return day;
	};

private:
	int year, month, day;
};

bool operator<(const Date& lhs, const Date& rhs) {
	if (lhs.GetYear() < rhs.GetYear()) return true;
	else if ((lhs.GetYear() == rhs.GetYear()) && (lhs.GetMonth() < rhs.GetMonth())) return true;
	else if ((lhs.GetYear() == rhs.GetYear()) && (lhs.GetMonth() == rhs.GetMonth()) && (lhs.GetDay() < rhs.GetDay())) return true;
	else return false;
}

bool operator==(const Date& lhs, const Date& rhs) {
	if ((lhs.GetYear() == rhs.GetYear()) && (lhs.GetMonth() == rhs.GetMonth()) && (lhs.GetDay() == rhs.GetDay())) return true;
	else return false;
}

void PrintDate(Date D) {
	cout << setfill('0');
	cout << setw(4) << D.GetYear();
	cout << setfill('0');
	cout << "-";
	cout << setw(2) << D.GetMonth();
	cout << setfill('0');
	cout << "-";
	cout << setw(2) << D.GetDay();
	cout << setfill('0');
	cout << " ";
}

class Database {
public:
	void AddEvent(const Date& date, const string& event) {
		data[date].insert(event);
	};

	void DeleteEvent(const Date& date, const string& event) {
		if (data[date].count(event) == 1) {
			data[date].erase(event);
			cout << "Deleted successfully" << endl;;
		}
		else {
			cout << "Event not found" << endl;
		}
	};

	int DeleteDate(const Date& date) {
		set <string> s = data.at(date);
		int n = s.size();
		data.erase(date);
		cout << "Deleted " + to_string(n) + " events"<< endl;
		return n;
	};


	void Find(const Date& date) const {
		set <string> s = data.at(date);
		for (auto& i : s) {
			cout << i << " ";
		}
		cout << endl;
	};

	void Print() const {
		for (auto& t : data) {
			PrintDate(t.first);
			set <string> s = data.at(t.first);
			for (auto& i : s) {
				cout << i << " ";
			}
			cout << endl;
		}
	};

private:
	map<Date, set <string>> data;
};

Date CheckDate(string& q) {
	stringstream ss(q);
	int y, m, d;
	if (isdigit(ss.peek())) {
		ss >> y;

		if (CountDash(ss) == 1) {
			while (ss.peek() == '-') {
				char c;
				ss >> c;
			}
			if (isdigit(ss.peek())) {
				ss >> m;
			}
		}
		else if (CountDash(ss) == 2) {
			while (ss.peek() == '-') {
				char c;
				ss >> c;
			}
			if (isdigit(ss.peek())) {
				ss >> m;
				m = m*(-1);
			}
		}
		else throw invalid_argument("Wrong date format: " + q);

		if (CountDash(ss) == 1) {
			while (ss.peek() == '-') {
				char c;
				ss >> c;
			}
			if (isdigit(ss.peek())) {
				ss >> d;
			}
		}
		else if (CountDash(ss) == 2) {
			while (ss.peek() == '-') {
				char c;
				ss >> c;
			}
			if (isdigit(ss.peek())) {
				ss >> d;
				d = d*(-1);
			}
		}
		else invalid_argument("Wrong date format: " + q);
		if (ss.peek() != EOF) invalid_argument("Wrong date format: " + q);
	}
	else if (ss.peek() == '-') {
		char c;
		ss >> c;

		if (isdigit(ss.peek())) {
			ss >> y;
			y = y*(-1);

			if (CountDash(ss) == 1) {
				while (ss.peek() == '-') {
					char c;
					ss >> c;
				}
				if (isdigit(ss.peek())) {
					ss >> m;
				}
			}
			else if (CountDash(ss) == 2) {
				while (ss.peek() == '-') {
					char c;
					ss >> c;
				}
				if (isdigit(ss.peek())) {
					ss >> m;
					m = m*(-1);
					cout << m << endl;
				}
			}
			else throw invalid_argument("Wrong date format: " + q);

			if (CountDash(ss) == 1) {
				while (ss.peek() == '-') {
					char c;
					ss >> c;
				}
				if (isdigit(ss.peek())) {
					ss >> d;
				}
			}
			else if (CountDash(ss) == 2) {
				while (ss.peek() == '-') {
					char c;
					ss >> c;
				}
				if (isdigit(ss.peek())) {
					ss >> d;
					d = d*(-1);
				}
			}
			else throw invalid_argument("Wrong date format: " + q);
			if (ss.peek() != EOF) throw invalid_argument("Wrong date format: " + q);
		}
	}
	else invalid_argument("Wrong date format: " + q);

	return{ y, m, d };
}

int main() {
	Database db;
	string command;
	while (getline(cin, command)) {
		stringstream ss(command);
		string f;

		ss >> f;

		if (f.size() != 0) {
			if (f == "Add") {
				try {
					string g, h;
					ss >> g >> h;
					Date date = CheckDate(g);
					db.AddEvent(date, h);
				}
				catch (invalid_argument& ex) {
					cout << ex.what();
				}
			}
			else if (f == "Del") {
				string g;
				ss >> g;
				Date date = CheckDate(g);
				if (!ss.eof()) {
					string h;
					ss >> h;
					db.DeleteEvent(date, h);
				}
				else db.DeleteDate(date);
			}
			else if (f == "Find") {
				string g;
				ss >> g;
				Date date = CheckDate(g);
				db.Find(date);
			}
			else if (f == "Print") db.Print();
			else cout << "Unknown command: " << command << endl;
		}
	}

	return 0;
}