import java.util.ArrayList;
import java.util.HashSet;
import java.util.Scanner;

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

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);  
        ArrayList<HashSet<Integer>> list = new ArrayList<>();
        while(sc.hasNext()) {
            list.clear();
            int n = sc.nextInt();
            for (int i = 0; i < n; i++) {
                int num = sc.nextInt();
                HashSet<Integer> novy = new HashSet<>();
                while(num != 0) {
                    //System.out.println("cifra " +num % 10);
                    novy.add(num % 10);
                    num = num/10;
                }
                //System.out.println("size " + novy.size());
                
                boolean je = false;
                for (HashSet<Integer> set : list) {
                    if (set.containsAll(novy)) {
                        je = true;
                        break;
                    }
                }
                if (!je) {
                    list.add(novy);
                }
            }
            System.out.println(list.size());
        }
    }
    
}