#include <algorithm>
#include <iostream>
#include <string>
#include <set>

using namespace std;

int main()
{
    set<string> s;
    int test_num;
    cin >> test_num;
    cin.ignore(256, '\n');
    while (test_num) {

        string str;
        getline(cin, str);
        auto found = str.find_last_of("/");

        if (found != string::npos) {
            str = str.substr(found + 1);
        }
        found = str.rfind('.');
        str.erase(found, 4);

        found = str.find('.');
        if (found != string::npos) {
            str = str.substr(found + 2);
        }

        if (count(str.begin(), str.end(), '_') == 2) {
            found = str.find('_');
            str = str.substr(found + 1);
        }

        found = str.find_last_of("_");
        if (found == string::npos)
            found = str.find_last_of("-");
        auto artist = str.substr(0, found);
        auto song = str.substr(found + 1);
        if (song.at(0) == ' ')
            song.erase(0, 1);
        found = artist.find("_");
        if (found == string::npos)
            found = artist.find(".");
        if (found != string::npos)
            artist = artist.substr(found + 1);
        if (artist.at(0) == ' ')
            artist.erase(0, 1);
        if (artist.at(artist.size() - 1) == ' ')
            artist.erase(artist.size() - 1);

        s.insert(artist + song);
        test_num--;
    }
    cout << s.size() << endl;
    return 0;
}