#include "stdio.h"
#include <algorithm>

using namespace std;

int compare( const void *arg1, const void *arg2 )
{
	/* Compare all of both strings: */
	return strcmp(  (char* ) arg1, ( char* ) arg2 );
}

int main(void)
{
	FILE *in, *out;
	if((in = fopen("restante.in", "r"))==NULL)
		return -1;
	if((out = fopen("restante.out", "w"))==NULL)
		return -1;
	char a[36000][16];
	int N;
	fscanf(in, "%d\n", &N);
	for(int i=0; i<N; i++)
	{
		fscanf(in, "%s\n", a[i]);
		sort(a[i], a[i]+strlen(a[i])); 
	}
	qsort((void *)a, N, sizeof(char *), compare);
	int count = 0;
	for(int i=0; i<N-1; i++)
	{
		if(strcmp(a[i], a[i+1]))
			count++;
	}
	fprintf(out, "%d\n", count);
	fclose(in);
	fclose(out);
}