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

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

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        while (scanner.hasNextLine()) {
            int rowCount = Integer.parseInt(scanner.nextLine());
            String[] input = new String[rowCount];
            for (int i = 0; i < rowCount; i++) {
                input[i] = scanner.nextLine();
            }

            ArrayList<String> categories = new ArrayList<>();
            categories.add(input[0]);

            for (int i = 1; i < rowCount; i++) {
                for (int j = 0; j < categories.size(); j++) {
                    if (!compare(input[i], categories.get(j)) || !compare(categories.get(j), input[i])) {
                        boolean add = true;
                        
                        for (int k = 0; k < categories.size(); k++) {
                            if (compare(input[i], categories.get(k)) && compare(categories.get(k), input[i])) {
                                add = false;
                            }
                        }
                        
                        if (add) {
                            categories.add(input[i]);
                        }
                    }

                }
            }

            System.out.println(categories.size() + "");

        }
    }

    public static boolean compare(String a, String b) {

        for (int i = 0; i < a.length(); i++) {
            if (!b.contains("" + a.charAt(i))) {
                return false;
            }
        }

        return true;
    }
}