import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        if (n <= 0 || n > 100) {
            System.out.println("Invalid Input");
            return;
        }

        String[] names = new String[n];
        char[] status = new char[n];

        for (int i = 0; i < n; i++) {
            names[i] = sc.next();
            status[i] = sc.next().charAt(0);

            if (!names[i].matches("[a-zA-Z]+") || (status[i] != 'P' && status[i] != 'A')) {
                System.out.println("Invalid Input");
                return;
            }
        }

        String defaulter = sc.next();
        int presentCount = 0;

        for (int i = 0; i < n; i++) {
            if (names[i].equals(defaulter)) {
                continue; // Skip defaulter’s record
            }
            if (status[i] == 'P') {
                presentCount++;
            }
        }

        System.out.println(presentCount);
    }
}