#include <bits/stdc++.h>
using namespace std;

ifstream fin("restante.in");
ofstream fout("restante.out");

         ///  cuvant  fr
unordered_map<string, int> fr;

int main()
{
    int i, n, cnt = 0;
    string a;
    fin >> n;
    for (i = 1; i <= n; i++)
    {
        fin >> a;
        sort(a.begin(), a.end());
        fr[a]++;
        if (fr[a] == 1) cnt++;
        if (fr[a] == 2) cnt--;
    }
    fout << cnt;
    return 0;
}