#include <fstream>
#include <string.h>
#include <algorithm>
#define nMax 36001
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");
string S[nMax];
int n, i, sol;
int main()
{
    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]!=S[i-1]&&S[i]!=S[i+1])
            sol++;
    fout<<sol;
    return 0;
}