#include <bits/stdc++.h>
int n, c;
std::string s[36002];
int main()
{
    std::ifstream fin("restante.in");
    std::ofstream fout("restante.out");
    fin >> n;
    for (int i{1}; i <= n; i++)
    {
        fin >> s[i];
        std::sort (s[i].begin(), s[i].end());
    }
    std::sort (s + 1, s + n + 1);
    for (int i{1}; i <= n; i++)
        if (s[i-1] != s[i] && s[i+1] != s[i])
            c++;
    fout << c;
}