using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    static string[] SList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => ReadLine()).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var map = SList(n);
        var ans = 0;
        for (var i = 0; i < n; ++i)
        {
            var a = 0;
            var d = 0;
            for (var j = 0; j < n; ++j)
            {
                if (map[i][j] == 'A') ++a;
                if (map[i][j] == '.') ++d;
            }
            if (a + 1 == n && d == 1) ++ans;
        }
        for (var j = 0; j < n; ++j)
        {
            var a = 0;
            var d = 0;
            for (var i = 0; i < n; ++i)
            {
                if (map[i][j] == 'A') ++a;
                if (map[i][j] == '.') ++d;
            }
            if (a + 1 == n && d == 1) ++ans;
        }
        {
            var a = 0;
            var d = 0;
            for (var i = 0; i < n; ++i)
            {
                if (map[i][i] == 'A') ++a;
                if (map[i][i] == '.') ++d;
            }
            if (a + 1 == n && d == 1) ++ans;
        }
        {
            var a = 0;
            var d = 0;
            for (var i = 0; i < n; ++i)
            {
                if (map[i][n - i - 1] == 'A') ++a;
                if (map[i][n - i - 1] == '.') ++d;
            }
            if (a + 1 == n && d == 1) ++ans;
        }
        WriteLine(ans);
    }
}