/* 
 * File:   balloon.cpp
 * Author: cteam003
 *
 * Created on October 22, 2016, 9:18 AM
 */

#include <cstdlib>
#include <cstdio>
#include <iostream>
#include <string>
#include <set>
#include <map>

using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {
    string str;
    map<string, int> result;
    
    cin >> str;
    
    while(cin >> str)
    {
        set<char> tmp;
        
        for (char c : str)
            tmp.insert(c);
        
        str = "";
        
        for (char c : tmp)
            str += c;
        
        if (result.count(str) == 0)
            result[str] = 1;
        else
            result[str] = result[str] + 1;
    }
    
    cout << result.size();
    
    return 0;
}