#include <iostream>
#include <unordered_set>

using namespace std;

uint16_t get_group(int val) {
	uint16_t res = 0;
	for (;val; val/=10)
		res|= ( 1 << ((val%10) - 1));
	return res;
}
int main() {
	for (;;) {
		int n; cin >> n;
		if (cin.eof()) break;
		
		unordered_set<uint16_t> groups;

		for (int i = 0; i < n; i++) {
			int val; cin >> val;
			groups.insert(get_group(val));
		}

		cout << groups.size() << '\n';

	}
	return 0;
}