#include <cstdio>
#include <algorithm>
#include <string>
#include <vector>

using namespace std;

#define MAXL 32
char tmp[MAXL];

int N;
vector< string > x;

int main()
{
	freopen("restante.in", "rt", stdin);
	freopen("restante.out", "wt", stdout);

	scanf("%d", &N);
	for (int i = 0; i < N; i++)
	{
		string cur, Min;
		scanf(" %s", tmp);

		cur = tmp;
		sort( cur.begin(), cur.end() );
		x.push_back( cur );
	}
	sort( x.begin(), x.end() );

	int NR = 0;
	for (size_t k = 0; k < x.size(); k++)
	{
		string prv = "", nxt = "";
		if (k > 0) prv = x[k - 1];
		if (k + 1 < x.size()) nxt = x[k + 1];

		if (x[k] != prv && x[k] != nxt)
			NR++;
	}
	printf("%d\n", NR);
	return 0;
}