#include <iostream>
#include <set>
#include <cstring>
#include <string>
#include <sstream>
using namespace std;

int main(int argc, char** argv) {

    size_t cnt;
    
    while(cin >> cnt)
    {
        string str;
        set<string> setStr;
        for(size_t i = 0; i <= cnt; i ++)
        {
            set<int> arr;
            getline(cin,str);
            for(string::iterator it = str.begin(); it != str.end(); it ++)
                arr.insert((*it)-'0');
            stringstream newStr;
            for(auto & j: arr)
                newStr << j;
            setStr.insert(newStr.str());
          
            
        }
        /*for(auto & i : setStr)
            cout << "TEST:" << i << endl;*/
        cout << setStr.size()-1 << endl;
        
    }
    return 0;
}