import java.util.*;
import java.util.stream.Collectors;

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

        int n = Integer.parseInt(scanner.nextLine());
        List<String> names = new ArrayList<>();

        for (int i = 0; i < n; i++) {
            String[] tokens = scanner.nextLine().split("\\s+");

            if (tokens.length == 3) {
                if (!names.contains(tokens[0])) {
                    names.add(tokens[0]);
                } else {
                    System.out.println(String.format("%s is already in the list!", tokens[0]));
                }
            } else if (tokens.length == 4) {
                if (!names.contains(tokens[0])) {
                    System.out.println(String.format("%s is not in the list!", tokens[0]));
                }
                names.remove(tokens[0]);
            }
        }

        names.forEach(System.out::println);
    }
}