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#include <bits/stdc++.h>
using namespace std;
string t[36004];
int n,cnt;
void Citire()
{
ifstream fin("restante.in");
fin >> n;
for(int i = 0; i < n; i++)
{
fin >> t[i];
sort(t[i].begin() , t[i].end());
}
}
void Rezolvare()
{ int i;
sort(t , t + n);
if(t[0] != t[1]) cnt++;
for(i = 1; i < n; i++)
if(t[i] != t[i+1] && t[i] != t[i-1])
cnt++;
ofstream fout("restante.out");
fout << cnt;
}
int main()
{
Citire();
Rezolvare();
return 0;
}