#include <fstream>
#include <algorithm>

#define Ndim 36006
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");
int N,sol;
string S[Ndim];
void read_prep()
{
    int i;
    fin>>N;
    for(i=1;i<=N;i++)
    {
        fin>>S[i];
        sort(S[i].begin(),S[i].end());
    }
    sort(S+1,S+N+1);
}
void solve()
{
    for(int i=1;i<=N;i++)
    {
        if(S[i]!=S[i-1]&&S[i]!=S[i+1])
            sol++;
    }
}
void print()
{
    fout<<sol;
}
int main()
{
    read_prep();
    solve();
    print();
    return 0;
}