/*
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/* 
 * File:   baloon.cpp
 * Author: cteam081
 *
 * Created on 22. října 2016, 10:25
 */

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

using namespace std;

string normalize(string input) {
    string result="..........";
    for (char c:input) {
        result[c-'0']='x';
    }
    return result;
}

int main() {
    set<string> types;
    int amount;
    while(cin >> amount) {
        types.clear();
        string x;
        while(amount--) {
            cin >> x;
            types.insert(normalize(x));
        }
        cout << types.size() << endl;
    }
    return 0;
}