#include<stdio.h>
#include<algorithm>
#include<string.h>
#define MAXN 40000

using namespace std;

char s[MAXN][18];
int i,j,n,m;
int ind[MAXN];

bool cmp(const int &b,const int &a)
{
    if( strcmp(s[a],s[b])<0)
        return true;
    return false;
}

int main(void)
{
    freopen("restante.in","r",stdin);
    freopen("restante.out","w",stdout);
    scanf("%d\n",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%s",s[i]);
        m=strlen(s[i]);
        sort(s[i],s[i]+m);
        ind[i]=i;
    }
    sort(ind+1,ind+n+1,cmp);
    int nr=0;
    for (i=2;i<n;i++)
        if (strcmp(s[ind[i]], s[ind[i-1]]) && strcmp(s[ind[i]], s[ind[i+1]]))
            nr++;

    if (strcmp(s[ind[1]], s[ind[2]])) nr++;
    if (strcmp(s[ind[n-1]], s[ind[n]])) nr++;

    printf("%d\n",nr);
    return 0;
}