#include <bits/stdc++.h>
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");

int main()
{
    int n, cnt = 0;
    bool original = true;
    fin>>n;

    char cuv[36001][17];
    for(int i = 0; i<n; i++)
    {
        fin>>cuv[i];
        sort(cuv[i], cuv[i] + sizeof(cuv[i]));
    }

    for(int i = 0; i<n; i++)
    {
        original = true;
        for(int j = i+1; j<n; j++)
        {
            if(strcmp(cuv[i], cuv[j]) == 0)
            {
                original = false;
                break;
            }
        }

        if(original)
        {
            cnt++;
        }
    }

    fout<<cnt;

    return 0;
}