import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

public class HouseParty {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        ArrayList<String> guestsList = new ArrayList<>();
        int n = Integer.parseInt(scanner.nextLine());

        for (int i = 0; i < n; i++) {
            String[] tokens = scanner.nextLine().split("\\s+", 2);
            String name = tokens[0];
            if (tokens[1].equals("is going!")) {
                if (guestsList.contains(name)) {
                    System.out.printf("%s is already in the list!%n", name);
                } else {
                    guestsList.add(name);
                }

            } else {
                if (guestsList.contains(name)) {
                    guestsList.remove(name);
                } else {
                    System.out.printf("%s is not in the list!%n", name);
                }
            }
        }

        for (String name : guestsList) {
            System.out.println(name);
        }
    }
}
//input:
//4
//Allie is going!
//George is going!
//John is not going!
//George is not going!