#include<stdio.h>
#include<fstream>
#include<string.h>
#include<algorithm>
using namespace std;

char c[17];
string v[36001];

int main()
{
    freopen("restante.in","r",stdin);
    freopen("restante.out","w",stdout);
    int n,i,j,sol=0;
    scanf("%d\n",&n);
    for(i=1;i<=n;++i)
    {
        scanf("%s",&c);
        sort(c,c+strlen(c));
        v[i]=c;
    }
    sort(v+1,v+1+n);
    for(i=1;i<=n;++i)
        if(v[i]!=v[i-1]&&v[i]!=v[i+1])
            ++sol;
    printf("%d\n",sol);
    return 0;
}