#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;

ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}

template<typename T> void chmin(T& a, T b){a = min(a, b);}
template<typename T> void chmax(T& a, T b){a = max(a, b);}

int main(){
	int n;
	cin >> n;
	vector<string> s(n);
	cin >> s;
	int ans = 0;
	rep(y, n){
		int p = 0, q = 0;
		rep(x, n){
			if(s[y][x] == 'A') p++;
			if(s[y][x] == '.') q++;
		}
		if(p == n - 1 and q == 1) ans++;
	}
	rep(x, n){
		int p = 0, q = 0;
		rep(y, n){
			if(s[y][x] == 'A') p++;
			if(s[y][x] == '.') q++;
		}
		if(p == n - 1 and q == 1) ans++;
	}
	{
		int p = 0, q = 0;
		rep(i, n){
			if(s[i][i] == 'A') p++;
			if(s[i][i] == '.') q++;
		}
		if(p == n - 1 and q == 1) ans++;
	}
	{
		int p = 0, q = 0;
		rep(i, n){
			if(s[i][(n - 1) - i] == 'A') p++;
			if(s[i][(n - 1) - i] == '.') q++;
		}
		if(p == n - 1 and q == 1) ans++;
	}
	cout << ans << "\n";
	return 0;
}