import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

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

        List<String> guestList = 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(guestList.contains(name)){
                   System.out.println(String.format("%s is already in the list!",name));
               }else {
                   guestList.add(name);
               }
           }else {
               if(guestList.contains(name)){
                   guestList.remove(name);
               }else{
                   System.out.println(String.format("%s is not in the list!",name));
               }
           }
        }
        for(String guest : guestList){
            System.out.println(guest);
        }
    }
}