#include<bits/stdc++.h>
#define lmax 36001
using namespace std;
ifstream fin ( "restante.in" );
ofstream fout ( "restante.out" );
string v[lmax], s;
int main()
{
    int n, c = 0;
    ios_base::sync_with_stdio ( false );
    fin.tie ( nullptr ), fout.tie ( nullptr );
    fin >> n;
    for ( int i = 1; i <= n; i++ )
    {
        fin >> s;
        sort ( s.begin(), s.end() );
        v[i] = s;
    }
    sort ( v + 1, v + n + 1 );
    for ( int i = 1; i <= n ; i++ )
    {
        if ( v[i] != v[i - 1] )
        {
            if ( v[i] != v[i + 1] )
            {
                c++;
            }
        }
    }
    fout << c;
}