#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
#define INF 1000000001LL
#define LNF 1000000000000000001LL
#define MOD 998244353LL
#define MAX 2001
#define long long long
#define all(x) x.begin(),x.end()
using namespace std;

int main()
{
	ios_base::sync_with_stdio(0); 
    cin.tie(0);

    int n;
    cin >> n;


    vector<string> pan(n);

    for(int i = 0; i<n; i++)
        cin >> pan[i];

    int res = 0;
    for(int i = 0; i < n; i++)
    {
        int A = 0;
        int dot = 0;
        for(int j = 0; j<n; j++)
        {
            if(pan[i][j] == 'A')
                A++;
            if(pan[i][j] == '.')
                dot++;
        }

        if(A == n-1 && dot == 1)
            res++;
    }

    for(int i = 0; i < n; i++)
    {
        int A = 0;
        int dot = 0;
        for(int j = 0; j<n; j++)
        {
            if(pan[j][i] == 'A')
                A++;
            if(pan[j][i] == '.')
                dot++;
        }

        if(A == n-1 && dot == 1)
            res++;
    }

    int A = 0;
    int dot = 0;
    for(int i = 0; i<n; i++)
    {
        if(pan[i][i] == 'A')
            A++;
        if(pan[i][i] == '.')
            dot++;
    }
    if(A == n-1 && dot == 1)
        res++;
    
    A = 0;
    dot = 0;
    for(int i = 0; i<n; i++)
    {
        if(pan[i][n-1-i] == 'A')
            A++;
        if(pan[i][i] == '.')
            dot++;
    }
    if(A == n-1 && dot == 1)
        res++;
    cout << res << endl;
    return 0;
}