/* 
 * File:   balloon.cpp
 * Author: cteam011
 *
 * Created on October 22, 2016, 9:17 AM
 */

#include <cstdlib>
#include <iostream>
#include <set>
#include <cstdio>

using namespace std;

int makeInt(bool s [9]){
    int ret = 0;
    for ( int i = 0; i < 9; i++){
        ret += s[i];
        ret*=10;
    }
    return ret;
}

int main(int argc, char** argv) {
    set<int> cats;
    int poc;
    while(!feof(stdin) && cin>>poc){
        
        getchar();
        for (int i = 0; i < poc; i++){
            bool bal[9];
            for (int i = 0; i < 9; i++) bal[i] = false;
            char c;
            while ((c = getchar())!= '\n' && !feof(stdin))
                bal[c-'1'] = true;
            cats.insert(makeInt(bal));
        }
        cout<<cats.size()<<endl;
        cats.clear();
    }
    return 0;
}