#include <bits/stdc++.h>
#ifdef LOCAL
#include "./debug.cpp"
#else
#define debug(...)
#define print_line
#endif
using namespace std;
using ll = long long;

int main() {
    int N;
    cin >> N;
    vector<string> S(N);
    for (int i = 0; i < N; i++) {
        cin >> S[i];
    }

    int ans = 0;
    for (int i = 0; i < N; i++) {
        int cnt = 0, cnt2 = 0;
        for (int j = 0; j < N; j++) {
            cnt += S[i][j] == 'A';
            cnt2 += S[i][j] == '.';
        }
        ans += cnt == N - 1 && cnt2 == 1;
        cnt = 0, cnt2 = 0;
        for (int j = 0; j < N; j++) {
            cnt += S[j][i] == 'A';
            cnt2 += S[j][i] == '.';
        }
        ans += cnt == N - 1 && cnt2 == 1;
    }

    int cnt = 0, cnt2 = 0;
    for (int i = 0; i < N; i++) {
        cnt += S[i][i] == 'A';
        cnt2 += S[i][i] == '.';
    }
    ans += cnt == N - 1 && cnt2 == 1;
    cnt = 0, cnt2 = 0;
    for (int i = 0; i < N; i++) {
        cnt += S[i][N - i - 1] == 'A';
        cnt2 += S[i][N - i - 1] == '.';
    }
    ans += cnt == N - 1 && cnt2 == 1;

    cout << ans << endl;
}