#include<bits/stdc++.h>
using namespace std;
#include<atcoder/all>
using namespace atcoder;
#define rep(i,n) for (int i = 0; i < (n); ++i)
using ld = long double;
using ll = long long;

template<class T> bool chmax(T &a, T b)
{
	if(a<b)
	{
	a = b;
	return true;
	}
	return false;
}
template<class T> bool chmin(T &a, T b)
{
	if(a>b)
	{
		a = b;
		return true;
	}
	return false;
}
int N;
string S[100];
int main()
{
	cin >> N;
	rep(i,N) cin >> S[i];
	int ans = 0;
	rep(i,N) rep(j,N) if(S[i][j]=='.')
	{
		int fn = 0;
		{
			bool ok = true;
			rep(k,N) if(k!=j&&S[i][k]!='A') ok = false;
			if(ok) fn++;
		}
		{
			bool ok = true;
			rep(k,N) if(k!=i&&S[k][j]!='A') ok = false;
			if(ok) fn++;
		}
		if(i==j)
		{
			bool ok = true;
			rep(k,N) if(k!=i&&S[k][k]!='A') ok = false;
			if(ok) fn++;
		}
		if(i+j==N-1)
		{
			bool ok = true;
			rep(k,N) if(k!=i&&S[k][N-1-k]!='A') ok = false;
			if(ok) fn++;
		}
		ans += fn;
	}
	cout << ans << endl;
}