#include <bits/stdc++.h>

using namespace std;

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

const int NMAX = 36000;

string s[NMAX + 2];
int N;

int main()
{
    in >> N;
    for( int i = 0;  i < N;  ++i ) {
        in >> s[i];
        sort(s[i].begin(), s[i].end());
    }
    sort(s, s + N);
    s[N] = "";
    int cnt = 0;
    if( s[0] != s[1] )
        cnt = 1;
    for( int i = 1;  i < N;  ++i )
        if( s[i] != s[i - 1] && s[i] != s[i + 1] )
            cnt++;

    out << cnt << "\n";
    return 0;
}