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

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main() {
	int N;
	cin >> N;
	vector<string> s(N);
	rep(i, N) cin >> s[i];
	int ans = 0;
	rep(i, N) {
		int a = 0, d = 0;
		rep(j, N) {
			if(s[i][j] == 'A') a++;
			if(s[i][j] == '.') d++;
		}
		if(a == N - 1 && d == 1) ans++;
	}
	rep(j, N) {
		int a = 0, d = 0;
		rep(i, N) {
			if(s[i][j] == 'A') a++;
			if(s[i][j] == '.') d++;
		}
		if(a == N - 1 && d == 1) ans++;
	}
	int a = 0, d = 0;
	rep(i, N) {
		if(s[i][i] == 'A') a++;
		if(s[i][i] == '.') d++;
	}
	if(a == N - 1 && d == 1) ans++;
	a = 0;
	d = 0;
	rep(i, N) {
		if(s[N - 1 - i][i] == 'A') a++;
		if(s[N - 1 - i][i] == '.') d++;
	}
	if(a == N - 1 && d == 1) ans++;
	cout << ans << endl;
}