#include<fstream>
#include<algorithm>
#include<string.h>
using namespace std;
ifstream f("restante.in");
ofstream g("restante.out");
typedef char sir[20];
sir v[30005];
int i,n,nr,x[36005],tot,first,second;
bool cmp(int a,int b)
{
	return (strcmp(v[a],v[b])<0);
}
int main()
{
	f>>n;f.get();
	for(i=1;i<=n;i++)
	{
		f.getline(v[i],18);
		nr=strlen(v[i]);
		sort(v[i],v[i]+nr);
		x[i]=i;
	}
	sort(x+1,x+n+1,cmp);
	for(i=1;i<=n;i++)
	{
		first=strcmp(v[x[i-1]],v[x[i]]);
		second=strcmp(v[x[i]],v[x[i+1]]);
		if(strcmp(v[x[i-1]],v[x[i]])!=0 && strcmp(v[x[i]],v[x[i+1]])!=0)
		{
			tot++;
		}
	}
	g<<tot;
}