#include <fstream>
#include <algorithm>
#define NM 36005

using namespace std;

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

int n,i,nr;
string s[NM];

int main()
{
    fin >> n;
    for (i=1; i<=n; i++)
    {
        fin >> s[i];
        sort(s[i].begin(), s[i].end());
    }
    sort(s+1, s+n+1);
    for (i=1; i<=n; i++)
      if (s[i]!=s[i-1] && s[i]!=s[i+1])
        nr++;
    fout << nr;
    fin.close();
    fout.close();
    return 0;
}