#include <iostream>
#include <set>
#include <string>

using namespace std;

typedef long long int Long;

int main()
{
    Long N;
    while(cin >> N){
        set<int> data;
        string s;
        for(int n=0; n<N; n++){
            cin >> s;
            int I = 0;
            for(unsigned int i=0; i<s.length(); i++)
                I |= 1<<(s[i]);
            //cout << n << " " << s << " " << I << endl;
            data.insert(I);
        }

        //cout << "E " << data.size() << endl;
        cout << data.size() << endl;
    }


    return 0;
}