#include <bits/stdc++.h>
#define REP(A,B) for(int (A)=0;(A)<(B);(A)++)
using namespace std;
#define ll long long
int main() {
	int n;
	while(scanf("%d", &n)==1) {
		int num;
		set<set<int>> V;
		REP(i, n) {
			scanf("%d", &num);
			set<int> curr;
			while(num > 0) {
				curr.insert(num%10);
				num /= 10;
			}
			V.insert(curr);
		}
		printf("%d\n", (int)V.size());
	}
	return 0;
}