#include <iostream>
#include <string>
#include <vector>
using namespace std;

vector <string> flip (vector <string> a)
{
    vector <string> res (a);
    int n = (int) (a.size ());
    for (int i = 0; i < n; i++)
        for (int j = 0; j < n; j++)
            res[i][j] = a[j][i];
    return res;
}

vector <string> rotate90 (vector <string> a)
{
    vector <string> res (a);
    int n = (int) (a.size ());
    for (int i = 0; i < n; i++)
        for (int j = 0; j < n; j++)
            res[i][j] = a[j][n - i - 1];
    return res;
}

int main ()
{
    int n;
    cin >> n;
    vector <string> p (n);
    for (int i = 0; i < n; i++)
        cin >> p[i];
    vector <string> q = flip (p);
    int res = 0;
    for (int k = 0; k < 4; k++)
    {
        res += (p == q);
        q = rotate90 (q);
    }
    cout << res << endl;
    return 0;
}