ForceBook

import java.util.*;

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

        String input = scanner.nextLine();

        Map<String, List<String>> forceBook = new LinkedHashMap<>();

        while (!input.equals("Lumpawaroo")) {

            if (input.contains("|")) {

                String forceSide = input.split("\\s+\\|\\s+")[0];
                String forceUser = input.split("\\s++\\|\\s+")[1];

                forceBook.putIfAbsent(forceSide, new ArrayList<>());

                boolean isExist = false;
                for (List<String> list : forceBook.values()) {
                    if (list.contains(forceUser)) {
                        isExist = true;
                    }
                }
                if (!isExist) {
                    forceBook.get(forceSide).add(forceUser);
                }
            } else if (input.contains(" -> ")) {
                String forceUser = input.split("\\s+->\\s+")[0];
                String forceSide = input.split("\\s+->\\s+")[1];

                forceBook.entrySet().forEach(entry -> entry.getValue().remove(forceUser));
                forceBook.putIfAbsent(forceSide, new ArrayList<>());

                forceBook.get(forceSide).add(forceUser);
                System.out.printf("%s joins the %s side!%n", forceUser, forceSide);
            }
            input = scanner.nextLine();
        }
        forceBook.entrySet()
                .stream()
                .filter(entry -> entry.getValue().size() > 0)
                .sorted((e1, e2) -> {
                    int sortedResult = Integer.compare(e2.getValue().size(), e1.getValue().size());

                    if (sortedResult == 0) {
                        sortedResult = e1.getKey().compareTo(e2.getKey());
                    }
                    return sortedResult;
                }).forEach(entry -> {
            System.out.printf("Side: %s, Members: %d%n", entry.getKey(), entry.getValue().size());
            entry.getValue()
                    .stream()
                    .sorted()
                    .forEach(user -> System.out.println("! " + user));
        });
    }
}