/* 
 * File:   balloon.cpp
 * Author: cteam003
 *
 * Created on October 22, 2016, 9:18 AM
 */

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

using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {
    int count;
    string str;

    
    while(cin >> count)
    {
        map<string, int> result;
        
        for (int i = 0; i < count; i++)
        {
            cin >> str;

            set<char> tmp;

            for (char c : str)
                tmp.insert(c);

            str = "";

            for (char c : tmp)
                str += c;

            if (result.count(str) == 0)
                result[str] = 1;
            else
                result[str] = result[str] + 1;
        }

        cout << result.size() << endl;
    }
    return 0;
}