#include <fstream>
#include <algorithm>

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


string v[36002];
int main()
{
   int n;
   fin >> n;
   for (int i=0;i<n;i++)
   {
     fin >> v[i];
     sort (v[i].begin(), v[i].end());
   }
   sort (v,v+n);
   int cnt;
   if (v[0]!=v[1]) cnt=1;
   else cnt=0;
   for (int i=1;i<n;i++)
     if (v[i]!=v[i-1] && v[i]!=v[i+1])cnt++;

  fout << cnt << "\n";



}