#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int N, ans=0, c=0, d=0;
    cin >> N;

    vector<string> s(N);
    for (int i=0; i<N; i++) cin >> s[i];

    for (int i=0; i<N; i++){
        c = 0;
        d = 0;
        for (int j=0; j<N; j++){
            if (s[i][j] == 'A') c++;
            if (s[i][j] == '.') d++;
        }

        if (c == N-1 && d == 1) ans++;
    }

    for (int i=0; i<N; i++){
        c = 0;
        d = 0;
        for (int j=0; j<N; j++){
            if (s[j][i] == 'A') c++;
            if (s[j][i] == '.') d++;
        }

        if (c == N-1 && d == 1) ans++;
    }

    c = 0;
    d = 0;
    for (int i=0; i<N; i++){
        if (s[i][i] == 'A') c++;
        if (s[i][i] == '.') d++;
    }
    if (c == N-1 && d == 1) ans++;

    c = 0;
    d = 0;
    for (int i=0; i<N; i++){
        if (s[i][N-1-i] == 'A') c++;
        if (s[i][N-1-i] == '.') d++;
    }
    if (c == N-1 && d == 1) ans++;

    cout << ans << endl;

    return 0;
}