dark

import java.util.List;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;

class DarkSide {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        String command =scanner.nextLine();
        Map<String ,List<String>>map = new LinkedHashMap<>();
        while(!command.equals("Lumpawaroo")){

            if(command.contains("|")){
                String group =command.split("\\s+|\\s+")[0];
                String user=command.split("\\s+|\\s+")[1];
                if(!map.containsKey(group)){
                    map.put(group, new ArrayList<>());
                    map.get(group).add(user);
                } else {
                    List<String>currentPlayers=map.get(group);
                    if(currentPlayers.contains(user)){
                        currentPlayers.add(user);
                        map.put(group,currentPlayers);
                    }


                }
               /* boolean isExistUser=false;
                for(List<String>listUsers:map.values()){
                    if(listUsers.contains(user)){
                        isExistUser=true;
                        break;
                    }
                }
                if(!isExistUser){
                    map.get(group).add(user);
                }*/

            } else if(command.contains("->")){
                String user=command.split("\\s+->\\s+")[0];
                String group =command.split("\\s+->\\s+")[1];
                map.entrySet().forEach(entry ->entry.getValue().remove(user));
                 if(map.containsKey(group)){
                    List<String>currentPlayers=map.get(group);
                    currentPlayers.add(user);
                    map.put(group,currentPlayers);
                }else{
                    map.put(group, new ArrayList<>());
                    map.get(group).add(user);

                }
               System.out.printf("%s  joins the %s side!%n",user,group);
            }
            command =scanner.nextLine();
        }
        map.entrySet().stream().filter(entry ->entry.getValue().size()>0).forEach(entry ->{
            System.out.printf("Side: %s, Members: %d",entry.getKey(),entry.getValue().size());
            entry.getValue().forEach(user ->System.out.println("!"+user));
            }
        );

    }
}