import java.util.*;

public class practice {

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

        Map<String, List<String>> userEmail = new TreeMap<>();//TODO <<<<<

        String input = sc.nextLine();
        while (!input.equals("Statistics")) {
            String[] commands = input.split("->");
            String firstCommand = commands[0];
            switch (firstCommand) {
                case "Add": {
                    String username = commands[1];
                    if (userEmail.containsKey(username)) {
                        System.out.println(String.format("%s is already registered", username));
                    } else {
                        userEmail.put(username, new ArrayList<>());
                    }
                }
                break;// TODO OK<<<>>>
                case "Send": {
                    String username = commands[1];
                    String email = commands[2];
                    if (userEmail.containsKey(username)) {
                        userEmail.get(username).add(email);
                        //}else{
                        //userEmail.putIfAbsent(username).add(email);
                    }
                }
                break;
                case "Delete": {
                    String username = commands[1];
                    if (userEmail.containsKey(username)) {
                        userEmail.remove(username);
                    } else {
                        System.out.println(String.format("%s not found!", username));
                    }
                }
                break;
            }
            input = sc.nextLine();
        }
        System.out.println(String.format("Users count: %d", userEmail.size()));

        userEmail
                .entrySet()
                .stream()
                .sorted((a, b) -> b.getValue().size() - a.getValue().size())
                .forEach(entry ->{
                    System.out.println(entry.getKey());
                    entry.getValue().forEach(email ->System.out.printf(" - %s%n",email));
                });
    }
}