import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        char[][] field = new char[n][];
        for (int i = 0; i < n; i++) {
            field[i] = sc.next().toCharArray();
        }
        int ans = 0;
        for (int i = 0; i < n; i++) {
            int a = 0;
            int dot = 0;
            for (int j = 0; j < n; j++) {
                if (field[i][j] == 'A') {
                    a++;
                } else if (field[i][j] == '.') {
                    dot++;
                }
            }
            if (a == n - 1 && dot == 1) {
                ans++;
            }
        }
        for (int i = 0; i < n; i++) {
            int a = 0;
            int dot = 0;
            for (int j = 0; j < n; j++) {
                if (field[j][i] == 'A') {
                    a++;
                } else if (field[j][i] == '.') {
                    dot++;
                }
            }
            if (a == n - 1 && dot == 1) {
                ans++;
            }
        }
        int a = 0;
        int dot = 0;
        for (int i = 0; i < n; i++) {
            if (field[i][i] == 'A') {
                a++;
            } else if (field[i][i] == '.') {
                dot++;
            }
        }
        if (a == n - 1 && dot == 1) {
            ans++;
        }
        a = 0;
        dot = 0;
        for (int i = 0; i < n; i++) {
            if (field[i][n - i - 1] == 'A') {
                a++;
            } else if (field[i][n - i - 1] == '.') {
                dot++;
            }
        }
        if (a == n - 1 && dot == 1) {
            ans++;
        }
        System.out.println(ans);
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}