/* 
 * File:   balloon.cpp
 * Author: cteam027
 *
 * Created on October 22, 2016, 10:10 AM
 */

#include <cstdlib>
#include <iostream>
#include <set>
using namespace std;

/*
 * 
 */

void Add( int person, string & s )
{
    int tmp;
    while( person )
    {
        tmp = person % 10;
        person /= 10;
        s[tmp-1] = '1';
        tmp = 0;
    }
}


int main(int argc, char** argv) {
    int n, person;
    
    while( true )
    {
        cin >> n;
        if( cin . eof() ) break;
        set<string> set;
        for( int i = 0; i < n; i++ )
        {
            string s = "000000000";
            cin >> person;
            Add( person, s );
            //cout << s << endl;
            set . insert( s );
        }
        cout << set . size() << endl;
    }
    
    return 0;
}