#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <string>

using namespace std;

const int L_MAX = 20;
const int N_MAX = 36010;

char cuv[L_MAX];
string words[N_MAX];
int frecv[32];

int main()
{
	freopen("restante.in", "r", stdin);
#ifndef _SCREEN_
	freopen("restante.out", "w", stdout);
#endif

	int N, i, L, j, k;
	char c;

	scanf("%d\n", &N);
	for (i = 1; i <= N; i ++) {
		scanf("%s ", cuv);
		L = strlen(cuv);
		
		memset(frecv, 0, sizeof(frecv));
		for (j = 0; j < L; j ++) {
			frecv[cuv[j] - 'a'] ++;
		}

		for (c = 'a'; c <= 'z'; c ++) {
			if (frecv[c - 'a']) {
				for (k = 1; k <= frecv[c - 'a']; k ++) {
					words[i].push_back(c);
				}
			}
		}
	}

	sort(words + 1, words + N + 1);

	int rez = 0;
	for (i = 2; i < N; i ++) {
		if (words[i] != words[i - 1] && words[i] != words[i + 1]) {
			rez ++;
		}
	}

	if (words[N] != words[N - 1]) rez ++;
	printf("%d\n", rez);

	return 0;
}