#include <iostream>
#include <cstring>
#include <fstream>
#include <algorithm>

using namespace std;

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

const int NMAX=36000;
string s[NMAX+5];

int main()
{
    int n,i,kon=0;
    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-1]!=s[i] && s[i]!=s[i+1])
           kon++;
    fout<<kon;
    return 0;
}