#include <fstream>
#include <string>
#include <algorithm>
using namespace std;
ifstream cin("restante.in");
ofstream cout("restante.out");

string s,S[36000];
int n,viz[36013],i,nr(0),j;
int main()
{
  cin>>n;
  getline(cin,s);
  for (i=1;i<=n;++i) getline(cin,S[i]), sort(S[i].begin(),S[i].end());        
  sort(S+1,S+n+1);
  S[0]=S[n+1]='#';
  for (i=1;i<=n;++i)
     if(S[i]!=S[i-1] && S[i]!=S[i+1])++nr;
  cout<<nr;    
return 0;
}