#include <cstdio>
#include <iostream>
#include <algorithm>
using namespace std;

string v[3605];
int i,n,contor;

int main()
{
	freopen("restante.in","r", stdin);
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		cin>>v[i];
		sort(v[i].begin(),v[i].end());
	}	
	fclose(stdin);
	
	sort(v,v+n);
	for(i=1;i<n;i++)
	{
		if(v[i]!=v[i-1]) contor++;
	}
	freopen("restante.out","w", stdout);
	printf("%d",contor);
	
	
	return 0;
}