#include <iostream>
#include <map>
#include <utility>
#include <string>
#include <vector>

using namespace std;

int main() {
    vector<string> continentsOrder, countriesOrder;
    map<string, map<string, string>> places;
    int n;
    cin >> n;
    while (n != 0) {
        //continent country city
        string data, continent, country, city, val = "";
        getline(cin >> ws, data);
        for (int k = 0; k <= data.length(); k++) {
            if (data[k] == ' ' || k == data.length()) {
                if (continent == "") {
                    continent = val;
                }
                else if (country == "") {
                    country = val;
                }
                else {
                    city = val;
                }
                val = "";
            }
            else {
                val += data[k];
            }
        }
        auto find = places.find(continent);
        if (find == places.end()) {
            continentsOrder.push_back(continent);
            map<string, string> locations;
            places[continent] = locations;

        }
        map<string, string>& mapLink = places[continent];
        auto find2 = mapLink.find(country);
        if (find2 == mapLink.end()) {
            countriesOrder.push_back(country);
            mapLink[country] = "";
        }
        if (mapLink[country].length() > 0) {
            mapLink[country] += ", ";
        }
        mapLink[country] += city;
        n--;
    }

    for (string c : continentsOrder) {
        auto continent = places.find(c);
        cout << continent->first << ":\n";

        for (string c2 : countriesOrder) {
            auto country = places[continent->first].find(c2);
            if (country != places[continent->first].end()) {
                cout << "  " << country->first << " -> " << country->second << endl;
            }
            else {
                continue;
            }
        }

    }
    return 0;
}