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package task1;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 *
 * @author cteam075
 */
public class Task1 {

    public static BufferedReader in;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        // TODO code application logic here
        in = new BufferedReader(new InputStreamReader(System.in));

        String row;
        long number;
        long result;

        List<Set<Integer>> sets = new ArrayList();
        Set<Integer> set = new HashSet();

        while ((row = in.readLine()) != null) {
            int rowss = Integer.valueOf(row);
            for (int i = 0; i < rowss; i++) {
                String flights = in.readLine();
                for (int j = 0; j < flights.length(); j++) {
                    set.add(Integer.valueOf(flights.charAt(j)));
                }
                if (sets.size() == 0) {
                    sets.add(new HashSet(set));
                } else {
                    int size = sets.size();
                    boolean l = false;
                    for (int k = 0; k < size; k++) {
                        if (set.equals(sets.get(k))) {
                            l = true;
                            break;
                        }
                    }
                    if(!l)sets.add(new HashSet(set));
                }
                set.clear();
            }
            System.out.println(sets.size());
            sets.clear();
        }
    }

}