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#include <algorithm>
#include <fstream>
#include <cstring>
using namespace std;
const int N=36002;
ifstream fin("restante.in");
ofstream fout("restante.out");
char a[N][20];
int poz[N];
bool comp(int r, int t)
{
if(strcmp(a[r], a[t])>0) return 1;
return 0;
}
int main()
{
int n, i, sol=0;
fin>>n;
for(i=1;i<=n;i++)
{
fin>>a[i];
sort(a[i], a[i]+strlen(a[i]));
poz[i]=i;
}
sort(poz+1, poz+n+1, comp);
for(i=1;i<=n;i++)
{
if(strcmp(a[poz[i]], a[poz[i-1]])&&strcmp(a[poz[i]], a[poz[i+1]])) sol++;
}
fout<<sol;
fin.close();
fout.close();
}