#include <iostream>
#include <set>

using namespace std;

int main() {
	int n;
	while(cin >> n) {
		set<int> gr;
		int a;
		for(int i = 0; i< n; i++) {
			int l = 0;
			cin >> a;
			while(a>0){
				int tmp = a%10;
				a/=10;	
				l = l | (1<<tmp);
			}
			gr.insert(l);
		}
		cout << gr.size() << endl;
	}

	return 0;
}