import java.util.*;

class Balloon {
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        while(true) {
            if(!in.hasNextInt())
                break;
            int n = in.nextInt();
            in.nextLine();
            ArrayList<String> groups = new ArrayList<String>();
            String line;

            for(int i = 0; i < n; i++) {
                line = in.nextLine();
                ArrayList<Character> list = new ArrayList<Character>();
                for(int j = 0; j < line.length(); j++){
                    char c = line.charAt(j);
                    if(!list.contains(c))
                        list.add(c);
                    if(list.size() >= 9)
                        break;
                }
                list.sort(null);
                line = list.toString();
                if(!groups.contains(line))
                    groups.add(line);
            }

            System.out.println(groups.size());
        }
    }
}