t200

import java.util.Scanner;

public class t200 {
    static Scanner in = new Scanner(System.in);
    static int n = in.nextInt();
    static int [][] a = new int [n+2][n+2];
    static int k = 1;

    public static void dfs(int s, int e) {
        a[s][e] = 0;
        if(a[s-1][e] == 1) {
            k++;
            dfs(s-1, e);
        }
        if(a[s+1][e] == 1) {
            k++;
            dfs(s+1, e);
        }
        if(a[s][e-1] == 1) {
            k++;
            dfs(s, e-1);
        }
        if(a[s][e+1] == 1) {
            k++;
            dfs(s, e+1);
        }


    }


    public static void main(String[] args) {
        String command;
        for (int i = 1; i < n+1; i++) {
            command = in.next();
            char [] chArray = command.toCharArray();
            for (int j = 0; j < n; j++) {
                if(chArray[j] == '.')
                    a[i][j+1] = 1;
                else
                    a[i][j+1] = 0;
            }

        }

        int s = in.nextInt();
        int e = in.nextInt();
        dfs(s, e);
        System.out.println(k);
    }
}