#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    cin >> n;
    vector<vector<char>> s(n, vector<char>(n));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cin >> s[i][j];
        }
    }
    int ans = 0;
    for (int i = 0; i < n; i++) {
        int cnta = 0, cntp = 0;
        for (int j = 0; j < n; j++) {
            if (s[i][j] == 'A') {
                cnta++;
            } else if (s[i][j] == '.') {
                cntp++;
            }
        }
        if (cnta == n - 1 && cntp == 1) {
            ans++;
        }
    }
    for (int j = 0; j < n; j++) {
        int cnta = 0, cntp = 0;
        for (int i = 0; i < n; i++) {
            if (s[i][j] == 'A') {
                cnta++;
            } else if (s[i][j] == '.') {
                cntp++;
            }
        }
        if (cnta == n - 1 && cntp == 1) {
            ans++;
        }
    }
    int cnta = 0, cntp = 0;
    for (int i = 0; i < n; i++) {
        if (s[i][i] == 'A') {
            cnta++;
        } else if (s[i][i] == '.') {
            cntp++;
        }
    }
    if (cnta == n - 1 && cntp == 1) {
        ans++;
    }
    cnta = 0, cntp = 0;
    for (int i = 0; i < n; i++) {
        if (s[i][n - 1 - i] == 'A') {
            cnta++;
        } else if (s[i][n - 1 - i] == '.') {
            cntp++;
        }
    }
    if (cnta == n - 1 && cntp == 1) {
        ans++;
    }
    cout << ans << endl;
}