#include<stdio.h>
#include<algorithm>
#include<vector>
#include<string>
#include<iostream>
using namespace std;

int main()
{
	int N, ok, nr = 0;
	vector<string> cuvinte;
	string cuvant;
	freopen("restante.in", "r", stdin);
	freopen("restante.out", "w", stdout);

	scanf("%d", &N);

	for(int i = 0; i < N; ++i)
	{
		cin >> cuvant;
		cuvinte.push_back(cuvant);
	}

	for(int i = 0; i < N; ++i)
		sort(cuvinte[i].begin(), cuvinte[i].end());

	if(cuvinte[0] != cuvinte[1])
		nr++;

	for(int i = 1; i < N-1; ++i)
	{

		if((cuvinte[i] != cuvinte[i-1]) && (cuvinte[i] != cuvinte[i+1]))
			nr++;
	}

	if(cuvinte[N-1] != cuvinte[N-2])
		nr++;

	printf("%d\n", nr);

	return 0;
}