#include <bits/stdc++.h>

using namespace std;

#define DEBUG(x) cout <<'>'<<#x<<':'<< endl;
#define ll long long
#define vvi vector<vector<int>>
#define vi vector<int>
#define INT 1000000000

int main(int argc, char** argv){
    ios_base::sync_with_stdio(false);
    int T, N;
    map<int, int> used;
    map<int, int> used_bin;
    string s;
    while(cin >> N) {
        used_bin.clear();
        int res = N;
        for (int i = 0; i < N; i++) {
            used.clear();
            cin >> s;
            for (int i = 0; i < s.length(); i++) {
//                cout << ((s[i]) - '0') << endl;
                used[(s[i]) - '0'] = 1;                
            }
            int num = 0;
            for (int i = 1; i < 10; i++) {
                num += used[i] * (1 << i);                
            }       
//            cout << num << endl;
            if (used_bin[num] == 1) {
                --res;
            } else {
                used_bin[num] = 1;
            }                      
            
        }
        cout << res << endl;

    }
    return 0;
}