/* 
 * File:   balloon.cpp
 * Author: cteam037
 *
 * Created on October 22, 2016, 9:19 AM
 */

#include <cstdlib>
#include <iostream>
#include <set>
#include <string>

using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {
    ios::sync_with_stdio(false);
    int trainees;
    int category;
    set<int> categories;
    string line;
    while (cin >> trainees) {
        categories.clear();
        for (; trainees > 0; --trainees) {
            cin >> line;
            category = 0;
            for (unsigned int i = 0; i < line.length(); ++i) {
                category |= 1 << (line.at(i) - '1');
            }
            categories.insert(category);
        }
        cout << categories.size() << endl;
    }
    return 0;
}