import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class inboxMenager {
    static Map<String, ArrayList<String>> usersList = new HashMap<>();
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String input;
        while (!(input = scanner.nextLine()).equals("Statistics")) {
            String[] commands = input.split("->");
            switch (commands[0]){
                case "Add":
                    add(commands[1]);
                    break;
                case "Delete":
                    delete(commands[1]);
                    break;
                case "Send":
                    send(commands[1],commands[2]);
                    break;

            }
        }
        System.out.println("Users count: "+usersList.size());
        usersList.entrySet()
                .stream()
                .sorted((a,b)->{
                    if (a.getValue().size() == b.getValue().size()) {
                        return a.getKey().compareTo(b.getKey());
                    } else {
                        return Integer.compare(b.getValue().size(),a.getValue().size());
                    }
                }).forEach(e->{
                    System.out.println(e.getKey());
            for (String email : e.getValue()) {
                System.out.println(" - "+ email);
            }
        });

    }

    private static void delete(String user) {
        if (usersList.containsKey(user)) {
            usersList.remove(user);
        }else {
            System.out.println(user +" not found!");
        }
    }

    private static void send(String user, String email) {
        usersList.get(user).add(email);
    }

    private static void add(String user) {
        if (!usersList.containsKey(user)) {
            usersList.put(user, new ArrayList<>());
        }else {
            System.out.println(user +" is already registered");
        }
    }
}