#include <bits/stdc++.h>
int n, l, c;
char cuv[36002][20];
bool ok;
int main()
{
    std::ifstream fin("restante.in");
    std::ofstream fout("restante.out");
    fin >> n;
    for (int i{1}; i <= n; i++)
    {
        fin >> cuv[i];
        l = strlen(cuv[i]);
        std::sort (cuv[i], cuv[i] + l);
    }
    for (int i{1}; i < n; i++)
    {
        ok = false;
        for (int j{i + 1}; j <= n && ok == false; j++)
            if (strcmp(cuv[i], cuv[j]) == 0)
                ok = true;
        if (ok == false)
            c++;
    }
    fout << c;
}