#include <fstream>
#include <algorithm>
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");

int main()
{
    int n, cnt = 0;
    bool original = true;
    fin >> n;

    char cuv[36001][17];
    for (int i = 0; i < n; i++)
    {
        fin >> cuv[i];
        sort(cuv[i], cuv[i] + strlen(cuv[i]) + 1);
    }

    for (int i = 0; i < n; i++)
    {
        original = true;
        for (int j = i + 1; j < n; j++)
        {
            if (strcmp(cuv[i], cuv[j]) == 0)
            {
                original = false;
                break;
            }
        }

        if (original)
        {
            cnt++;
        }
    }

    fout << cnt;

    return 0;
}