#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)
	{
		map<char,int> mp;
		rep(j,N) mp[S[i][j]]++;
		if(mp['A']==N-1) ans++;
	}
	rep(j,N)
	{
		map<char,int> mp;
		rep(i,N) mp[S[i][j]]++;
		if(mp['A']==N-1) ans++;
	}
	map<char,int> mp;
	rep(i,N) mp[S[i][i]]++;
	if(mp['A']==N-1) ans++;
	mp.clear();
	rep(i,N) mp[S[N-1-i][N-1-i]]++;
	if(mp['A']==N-1) ans++;
	cout << ans << endl;
}