import java.io$.*$;

import java.net.$*$;

public class Server $\{$

public static void main$($String$[]$ args$)\{$

try $\{$

ServerSocket serverSocket $=$ new ServerSocket $(9999)$;

Socket socket $=$ serverSocket.accept$()$;

BufferedReader in $=$ new BufferedReader$($new InputStreamReader$($socket$.$get String message $=$ in$.$readLine$()$; System.out.println$("$Client:$"+$ message$)$; socket.close$()$; serverSocket.close$()$; $\}$ catch $($IOException e$)\{$ e$.$printStackTrace$()$; $\}$

What is the output on the server side?

$\}$

$\}$

$6$