#include<fstream>
#include<string>
#include<algorithm>
using namespace std;

ifstream cin("restante.in");
ofstream cout("restante.out");

int n,i,sol;
string s,cuv[36010];

int main()
{
    cin>>n;
    for (i=1;i<=n;i++)
    {
        cin>>s;
        sort(s.begin(),s.end());
        cuv[i]=s;
    }
    sort(cuv+1,cuv+n+1);
    cuv[0]=cuv[n+1]="!";
    for (i=1;i<=n;i++)
        if (cuv[i]!=cuv[i-1] && cuv[i]!=cuv[i+1])
        sol++;
    cout<<sol;
    return 0;
}