#include <iostream>
#include <iomanip>
#include <map>
#include <sstream>
#include <set>
#include <string>
using namespace std;

struct Year
{
	int value;
	Year(const int new_value )
	{
		value = new_value;
	}
};

struct Month
{
	int value;
	Month(const int new_value)
	{
		if(new_value < 0 || new_value > 12)
		{
			throw runtime_error("Month value is invalid:" + to_string(new_value));
		}
		value = new_value;
	}
};

struct Day
{
	int value;
	Day(const int new_value)
	{
		if(new_value <= 0 || new_value > 31)
		{
			throw runtime_error("Day value is invalid:" + to_string(new_value));
		}
		value = new_value;
	}

};

class Date {
public:
  Date()
  {
	  year = 0;
	  month = 0;
	  day = 0;
  }
  Date(const Year y, const Month m, const Day d)
  {
	  year = y.value;
	  month = m.value;
	  day = d.value;
  }
  int GetYear() const
  {
	  return year;
  }
  int GetMonth() const
  {
	  return month;
  }
  int GetDay() const
  {
	  return day;
  }

private:
  int year;
  int month;
  int day;
};

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

istream& operator>>(istream& st, Date& date)
{
	int y, m, d;
	char s1, s2;
	st >> y >> s1 >> m >> s2 >> d;
	if(s1 != '-' || s2 != '-')
	{
		stringstream tmp;
		tmp << "Wrong date format:" << y << s1 << m << s2 << d;
		throw invalid_argument(tmp.str());
	}
	date = Date(Year(y), Month(m), Day(d));
	return st;
}

ostream& operator<<(ostream& st,const Date& date)
{
	st << setfill('0');
	st << setw(4) << date.GetYear() << '-' << setw(2) << date.GetMonth() << '-'
	   << setw(2) << date.GetDay();
	return st;
}

class Database {
public:
  void AddEvent(const Date& date, const string& event)
  {
	  base[date].insert(event);
  }
  bool DeleteEvent(const Date& date, const string& event)
  {
	  if(base[date].count(event) != 0)
	  {
		  base[date].erase(event);
		  return true;
	  }
	  else
		  return false;
  }
  int  DeleteDate(const Date& date)
  {
	  int nums = base[date].size();
	  base.erase(date);
	  return nums;

  }

  set<string> Find(const Date& date) /*const*/
  {
	  return base[date];
  }

  void Print() const
  {
	  for(const auto& i : base)
	  {
		  for(const auto& s : i.second)
		  {
			  cout << i.first << ' ' << s << endl;
		  }
	  }
  }

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

int main() {
  Database db;

  string line;
  while (getline(cin, line)) {
	stringstream ss;
	string command;
    ss << line;
    ss >> command;
    if(command == "Add")
    {
    	Date new_date;
    	string input;
    	try
    	{
    		ss >> new_date >> input;
			db.AddEvent(new_date, input);
    	}
    	catch(exception& er)
    	{
    		cout << er.what();
    		return 1;
    	}


    }
    else if(command == "Del")
    {
    	try
    	{
			Date new_date;
			string input;
			ss >> new_date >> input;
			if(input == "")
			{
				cout << "Deleted " << db.DeleteDate(new_date) << " events" << endl;
			}
			else if(db.DeleteEvent(new_date, input))
			{
				cout << "Deleted successfully" << endl;
			}
			else
			{
				cout << "Event not found" << endl;
			}
    	}catch(exception& ex)
    	{
    		cout << ex.what();
    		return 1;
    	}
    }
    else if(command == "Find")
    {
    	try
    	{
			Date new_date;
			ss >> new_date;
			for(const auto& i : db.Find(new_date))
			{
				cout << i << endl;
			}
    	}catch(exception& ex)
    	{
    		cout << ex.what();
    		return 1;
    	}
    }
    else if(command == "Print")
    {
    	db.Print();
    }
    else if(command == "")
    	continue;
    else
    {
    	cout << "Unknown command:" << command << endl;
    }
  }

  return 0;
}