import java.io.*;
import java.util.HashSet;
import java.util.Set;

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/**
 *
 * @author cteam071
 */
public class Balloon {public static BufferedReader in;
    
    public static void main(String[] args) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        
        String line;
        int trainees;
        Set<String> set;
        while((line = in.readLine()) != null){ 
            set = new HashSet<String>();
            trainees = Integer.parseInt(line);
            for (int i=0; i< trainees; i++){
                boolean[] balloons = {false,false,false,false,false,false,false,false,false};
                line = in.readLine();
                for(int j = 0; j < line.length(); j++){
                    balloons[Integer.parseInt(String.valueOf(line.charAt(j))) - 1] = true;
                }
                String s = "";
                for(int j = 0; j < 9; j++){
                    if (balloons[j]){
                        s += j+1;
                    }
                }                
                set.add(s);                
            }
            System.out.println(set.size());
        }
    }
    
}