import java.io.*;
import java.net.*;
 
class ATMClient {
    private static final String SERVER_ADDRESS = "127.0.0.1";
    private static final int SERVER_PORT = 5000;
 
    public static void main(String[] args) {
        try (Socket socket = new Socket(SERVER_ADDRESS, SERVER_PORT);
             BufferedReader userInput = new BufferedReader(new InputStreamReader(System.in));
             BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
             PrintWriter out = new PrintWriter(socket.getOutputStream(), true)) {
 
            System.out.print(in.readLine());  // "Enter card number: "
            String cardNumber = userInput.readLine();
            out.println(cardNumber);
 
            System.out.print(in.readLine());  // "Enter PIN: "
            String pin = userInput.readLine();
            out.println(pin);
 
            String response = in.readLine();
            System.out.println(response);
 
            if (response.startsWith("Welcome")) {
                boolean exit = false;
                while (!exit) {
                    System.out.println(in.readLine());  // Display options
                    String choice = userInput.readLine();
                    out.println(choice);
 
                    if ("1".equals(choice)) {
                        System.out.print(in.readLine());  // "Enter amount to withdraw: "
                        String amount = userInput.readLine();
                        out.println(amount);
                        System.out.println(in.readLine());  // Withdrawal response
                    } else if ("2".equals(choice)) {
                        System.out.println(in.readLine());  // "Thank you for using..."
                        exit = true;
                    } else {
                        System.out.println(in.readLine());  // Invalid choice message
                    }
                }
            } else {
                System.out.println("Invalid card number or PIN. Connection closing.");
            }
 
        } catch (IOException e) {
            System.err.println("Client error: " + e.getMessage());
        }
    }
}

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