#include <cstdio>
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int N, answer;
string s, word[36002];

int main(){

    freopen("restante.in", "r", stdin);
    freopen("restante.out", "w", stdout);

    scanf("%d", &N);

    for(int i = 1; i <= N; i++){
        cin >> s;
        sort(s.begin(), s.end());
        word[i] = s;
    }sort(word + 1, word + N + 1);

    word[0] = "1234567891011121314";
    word[N+1] = "12345678910111213";

    for(int i = 1; i <= N; i++){
        if(word[i] != word[i-1] && word[i] != word[i+1]){
            answer++;
        }
    }printf("%d", answer);

    return 0;
}