#include <string>
#include <set>
#include <vector>
#include <iostream>
#include <stdio.h>

using namespace std;

int main ()
{
	int trainee;
	while(scanf("%d", &trainee) > 0) {
		set<int> uniq; 				

		for(int i = 0; i < trainee; i++) {
			int n;			
			scanf("%d", &n);
			int key = 0;			
			while(n != 0) {
				int u = n%10;
				n /= 10;
				key = key | (1 << (u-1)); 
			}
			uniq.insert(key);	
		}
		cout << uniq.size() << endl;	

	}				
	return 0;
}