#include<fstream>
#include<algorithm>
#include<string>
#include<vector>
using namespace std;
ifstream f("restante.in");
ofstream g("restante.out");
vector<string>cuv;
bool comp(string a,string b)
{	if(a<b) return 1;
	return 0;
}
int main()
{	int N,i,j;
	f>>N;
	cuv.resize(N+2);
	for(i=1;i<=N;i++)
	{	f>>cuv[i];
		sort(cuv[i].begin(),cuv[i].end());
	}
	sort(cuv.begin(),cuv.end());
	i=1; j=0;
	while(i<=N)
	{	if(cuv[i]==cuv[i+1])
			for(i;i<=N && cuv[i]==cuv[i+1];i++);
		else
			j++;
		i++;
	}
	g<<j;
	f.close();
	g.close();
	return 0;
}