#include <fstream>
#include <map>
#include <algorithm>
using namespace std;
ifstream cin("restante.in");
ofstream cout("restante.out");
map<string,int> mp;
int n ;
int main()
{
    long long cnt = 0;

    cin >> n;
    for (int i = 1 ; i <= n ; i ++)
    {
        string a ;
        cin >>a;
        sort(a.begin(),a.end());
        mp[a] ++;
        if (mp[a] == 1)
            cnt ++;
    }

    cout <<cnt;

    return 0;
}