#include <bits/stdc++.h>

using namespace std;

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

int n;
string s;
unordered_map <string, int> fr;

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