import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.HashSet;

/*
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 */

/**
 *
 * @author tym11
 */
public class Ballon {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        
        for(;;) {
            String s = in.readLine();
            if (s == null) break;
            
            HashSet<Integer> hm = new HashSet<>();
            
            int n = Integer.valueOf(s);
            for (int i = 0; i < n; ++i) {
                int code = 0;
                String cat = in.readLine();
                for (char c: cat.toCharArray()) {
                    int b = c - '0';
                    code |= 1 << b;
                }
                hm.add(code);
            }
            
            int result = hm.size();
            System.out.println(result);
            
        }
    }
    
}