#include <bits/stdc++.h>

using namespace std;

typedef long long int ll;
typedef long double ld;

typedef pair<ll, ll> ii;
typedef vector<ll> vi;
typedef vector<ii> vii;

#define PB push_back

#define FOR(prom,a,b) for( ll prom = (a); prom < (ll)(b); ++prom )
#define F(a) FOR(i,0,a)
#define FF(a) FOR(j,0,a)

#define EPS (1e-10)
#define INF ((1<<30)-1)

#define EQ(a,b) (fabs(a-b)/fabs(a+b) < EPS)

int main ()
{
	ios::sync_with_stdio(false);

	set<set<int>> S;
	ll X, N;
	while(cin>>N){
			S.clear();
		F(N){
			set<int> tmp;
			cin>>X;
			while(X>0){
				tmp.insert(X%10);
				X/=10;
			}
				S.insert(tmp);
		}
	cout<<S.size()<<endl;

}

	return 0;
}