correction assessment 2

import java.util.*;
import java.io.*;
import java.math.*;

class Solution {

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        if (in.hasNextLine()) {
            in.nextLine();
        }
        String k = in.nextLine();
        int[] t = new int[n];
        int i = 0;
        int score = 0;
        int plus = 100/n;
        for(int x : k.toCharArray())
            t[i++] = x - 'A';
        for (i = 0; i < n; i++) {
            String a = in.nextLine();
            if(a.replaceAll("[^X]","").length() == 1 && a.charAt(t[i]) == 'X')
                score += plus;
        }



        System.out.println(score);
    }
}