#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int n,i,k;
char c[36001][17];
int sort_function( const void *a, const void *b)
{	return (strcmp((char*)b,(char*)a));}
int main()
{	freopen("restante.in","r",stdin);
	freopen("restante.out","w",stdout);
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{	scanf("%s",&c[i]);
		qsort((void *)c[i], n+1, sizeof(c[0][17]), sort_function);
	}
	for(i=1;i<=n-1;i++)
		if(strcmp(c[i],c[i+1])!=0)	k++;
	printf("%d",k);
}