#include<fstream>
#include<iostream>
#include<string>
#include<string.h>
#include<algorithm>
using namespace std;
string a[36010];
int main()
{
    freopen("resante.in","r",stdin);
	freopen("restante.out","w",stdout);
	int n,i,poz=0,sol=0;
    char x[20];
    scanf("%d\n",&n);
    while(n--)
    {
        gets(x);
        sort(x,x+strlen(x));
        a[++poz]=x;
    }
    sort(a+1,a+poz+1);
    poz-=1;
    if(a[1]!=a[2])
        sol++;
    for(i=2;i<=poz;i++)
        if(a[i]!=a[i-1] && a[i+1]!=a[i])
            sol++;
    if(a[poz+1]!=a[poz])
		sol++;
    printf("%d\n",sol);
    return 0;
}