#include<cstdio>
#include<algorithm>
#include<string>
using namespace std;
int n,i,l;
string s[36010];
int main() {
    freopen("restante.in","r",stdin),freopen("restante.out","w",stdout),scanf("%d\n",&n);
    for(i=1;i<=n;i++)
        fgets(s[i],17,stdin),sort(s[i].begin(),s[i].end());
    sort(s+1,s+n+1);
    for(i=1;i<=n;i++)
    if(s[i]!=s[i-1]&&s[i]!=s[i+1])
        l++;
    printf("%d",l);
}