#include <fstream>
#include <map>
#include <climits>
#include <math.h>
#include <iomanip>
#include <string>
#include <cstring>
#include <algorithm>
using namespace std;

#define ll long long
#define ull unsigned long long

ofstream cout("restante.out");
ifstream cin("restante.in");
map<string, int> mp;
int n;

int main()
{
    cin >> n;
    for(int z = 0; z < n; z++)
    {
        string s; cin >> s;
        sort(s.begin(), s.end());
        mp[s]++;
    }
    for(auto x : mp)
    {
        if(x.second > 1)
            n-=x.second;
    }
    cout<<n;
}