#include <iostream>
#include <vector>
#include <map>

using namespace std;


int main(){
    int q;
    map<string, string> directory;
    cin >> q;
    for (int i = 0; i < q; ++i) {
        string operation_code;
        cin >> operation_code;
        if (operation_code == "CHANGE_CAPITAL") {
            string country, new_capital;
            cin >> country >> new_capital;
            if (directory.count(country) == 0) {
                directory[country] = new_capital;
                cout << "Introduce new country " << country << " with capital " << new_capital << endl;
            }else {
                if (new_capital == directory[country]) {
                    cout << "Country " << country << " hasn't changed its capital" << endl;
                }else {
                    cout << "Country " << country << " has changed its capital from " << directory[country] << " to " << new_capital << endl;
                    directory[country] = new_capital;
                }
            }
        }else {
            if (operation_code == "RENAME") {
                string old_country_name, new_country_name;
                cin >> old_country_name >> new_country_name;
                if (old_country_name == new_country_name || directory.count(old_country_name) == 0 || directory.count(new_country_name) == 1) {
                    cout << "Incorrect rename, skip" << endl;
                }else {
                    cout << "Country " << old_country_name << " with capital " << directory[old_country_name] << "  has been renamed to " << new_country_name << endl;
                    directory[new_country_name] = directory[old_country_name];
                    directory.erase(old_country_name);
                }
            }else {
                if (operation_code == "ABOUT") {
                    string country;
                    cin >> country;
                    if (directory.count(country) == 0) {
                        cout << "Country " << country << " doesn't exist" << endl;
                    }else {
                        cout << "Country " << country << " has capital " << directory[country] << endl;
                    }
                }else {
                    if (operation_code == "DUMP") {
                        if (directory.size() == 0) {
                            cout << "There are no countries in the world" << endl;
                        }else {
                            for (auto item : directory) {
                                cout << item.first << "/" << item.second << " ";
                            }
                        }
                    }
                }
            }
        }

    }
    return 0;
}