import java.io.*;
import java.net.*;
import java.util.*;
public class Server
{
	public static void main(String[] args)
	{
		try
		{
			ServerSocket s=new ServerSocket(8189);
			Socket incoming=s.accept();
			try
			{
				InputStream inStream=incoming.getInputStream();
				OutputStream outStream=incoming.getOutputStream();
				Scanner in=new Scanner(inStream);
				PrintWriter out=new PrintWriter(outStream,true);
				boolean b=false;String line="";	out.println("Welkome");
				while(b==false)
				{
					if(in.hasNextLine())
					{	
					line=in.nextLine();
					if(line.trim().equals("Hello"))
					    {
						out.println("Hii");
						b=true;
						}
					}
				}
			}
			finally
			{
				incoming.close();
			}
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
}

import java.io.*;
import java.util.*;
import java.net.*;
public class User
{
	public static void main(String[] args) throws IOException
	{
		Socket s=new Socket("localhost",8189);
		InputStream inStream=s.getInputStream();
		OutputStream outStream=s.getOutputStream();
		Scanner in=new Scanner(inStream);
		PrintWriter out=new PrintWriter(outStream,true);
		boolean b=false;String l="",l2="";
		while(b==false)
		{
			if(in.hasNextLine())
			{
				l=in.nextLine();
				b=true;
			}
		}
		System.out.println(l);
		b=false;
		out.write("Hello");
		while(b==false)
		{
			if(in.hasNextLine())
			{
				l2=in.nextLine();
				b=true;
			}
		}
		System.out.println(l2);
	}
}