Write Java socket client and server programs respectively based on the following rules:

After the server accepts the client's connection request, it sends "Welcome!" to the client.

After the client receives "Welcome!", it can sends a line of user's keyboard input to the server; then, the server replies with the number of received characters (without counting in white spaces). When the client receives a reply from the server, it prints the received message to the standard output. This can be repeated over and over. If the clients sends "Bye.", the sockets should be closed.