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

int main(){
    ifstream f("restante.in");
    ofstream g("restante.out");
    int n;
    f >> n;
    vector<string> v(n);
    for(auto& x : v) f >> x, sort(begin(x), end(x));
    sort(begin(v), end(v));

    int rez = 0;
    for(int i = 0; i < n; ++i)
        if((i == 0 || v[i] != v[i-1]) &&
            (i == n-1 || v[i] != v[i+1])) ++rez;
    g << rez << endl; }