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using System;
using System.Collections.Generic;

public class Server
{
    private static string name;

    public Server()
    {
    }
    public Server(string x)
    {
        name = x;
    }
    static string ans = "";
    public static Server Connect(string Name)
    {
        if (name is null) return new Server(Name);
        else return new Server(name);
    }

    public void Send(string message)
    {
        if(name is null)
        {
            throw new ArgumentException("No connected server");
        }

        ans += $"Sending data {message} to server {name }";
        ans += Environment.NewLine;
    }

    public void Receive(string message)
    {
        if (name is null)
        {
            throw new ArgumentException("No connected server");
        }

        ans += $"Receiving data {message} from server {name}";
        ans += Environment.NewLine;
    }

    public void Output()
    {
        if (name is null)
        {
            throw new ArgumentException("No connected server");
        }
        Console.Write(ans);
        ans = "";
    }
}