import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
        
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author tym13
 */
public class Balloon {


    public static BufferedReader in;
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
    
       in = new BufferedReader(new InputStreamReader(System.in));
       
       while(true){
       int pocet=0;
        try {
            pocet = Integer.parseInt( in.readLine());
        } catch (IOException ex) {
            Logger.getLogger(Balloon.class.getName()).log(Level.SEVERE, null, ex);
        }
        String[] skup=new String [pocet];
       for (int i=0; i<pocet; i++){
            String vstup="";
            
           try {
              vstup = in.readLine();
           } catch (IOException ex) {
               Logger.getLogger(Balloon.class.getName()).log(Level.SEVERE, null, ex);
           }
           
           int[]pole=new int[10];
           
           for (int j=0; j<vstup.length(); j++){
               pole[Integer.parseInt(vstup.charAt(j)+"")]=1;
              
           }
           for (int j=0; j<pole.length; j++){
               if(pole[j]==1){
                  skup[i]=skup[i]+j;
               }
                   
              
           }
           
       }
    
       Arrays.sort(skup);
     
        int vys=0;
        String pom="";
       for(int q=0; q<skup.length; q++){
           if(pom.equals(skup[q])== false){
               vys++;
               pom=skup[q];
           }
           
       }
   
       System.out.println(vys);
    }
    }
}