import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;

/**
 *
 * @author kontris
 */
public class Balloon {

    /**
     * @param args the command line arguments
     */
    private static int poc;

    public static void main(String[] args) throws IOException {
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while ((line = input.readLine()) != null) {
            poc = Integer.parseInt(line);
            LinkedList<HashSet<Character>> list = new LinkedList<>();
            HashSet<Character> set;
            tmpc:
            for (int i = 0; i < poc; i++) {
                line = input.readLine();
                set = new HashSet<>();
                for (int j = 0; j < line.length(); j++) {
                    set.add(line.charAt(j));
                }
                for (HashSet<Character> hashSet : list) {
                    if (hashSet.containsAll(set)) {
                        continue tmpc;
                    }
                }
                list.add(set);
            }
            System.out.println(list.size());
        }

    }

}