#include <bits/stdc++.h>
#include <unordered_map>

using namespace std;

#pragma GCC optimize("Ofast")  
#pragma GCC target("avx,avx2,fma") 

#pragma warning(disable : 4996)

ifstream fin("restante.in");
ofstream fout("restante.out");

int n;

char a[17];

int contor;

bool verif = false;

unordered_map<string, int> umap;

void citire()
{
	for (int i = 1; i <= n; i++)
	{
		fin >> a;
		sort(a, a + strlen(a));
		if (!umap[a])
			contor++;
		else
			if (umap[a] == 1)
				contor--;
		umap[a]++;
	}
}

int main()
{
	fin >> n;
	citire();
	fout << contor;
	return 0;
}