import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

/**
 * Created by cteam006 on 10/22/16.
 */
public class Balloon {



    public static void main(String[] args) throws IOException {


        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        //StringTokenizer st = new StringTokenizer(br.readLine());



        int categoryCounter = 0;

        String s;

        while((s = br.readLine()) != null){



            Integer N = Integer.parseInt(s);

            ArrayList<Set<Integer>> categories = new ArrayList<>();
            String line= null;
            Set<Integer> set = null;


            for(int i = 0; i < N; i++){

                //line = st.nextToken();
                try {
                    line = br.readLine();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                set = new HashSet<>();



                if(line.contains("1")) {
                    set.add(1);
                }
                if(line.contains("2")) {
                    set.add(2);
                }
                if(line.contains("3")) {
                    set.add(3);
                }
                if(line.contains("4")) {
                    set.add(4);
                }
                if(line.contains("5")) {
                    set.add(5);
                }
                if(line.contains("6")) {
                    set.add(6);
                }
                if(line.contains("7")) {
                    set.add(7);
                }
                if(line.contains("8")) {
                    set.add(8);
                }
                if(line.contains("9")) {
                    set.add(9);
                }

                if(!categories.contains(set)){
                    categories.add(set);
                    categoryCounter +=1;
                }


            }
            System.out.println(categoryCounter);
            categoryCounter = 0;


        }






    }
}