import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.InetSocketAddress;

public abstract class Bot {

    private final String host;  // Hostname oder IP-Adresse des Servers
    private final int port;     // Port des Servers

    protected Bot(String[] args) {
        host = args.length > 0 ? args[0] : "localhost";
        port = args.length > 1 ? Integer.parseInt(args[1]) : 63187;
    }

    // Diese Methode stellt die Verbindung zum Server her und startet die Kommunikation
    protected void run() {
        try (Socket socket = new Socket()) {
            socket.connect(new InetSocketAddress(host, port));
            OutputStream out = socket.getOutputStream();
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            View view = new View();
            while (true) {
                view.read(in);
                view.print();
                try {
                    char ch = nextMove(view);
                    out.write(ch);  // Sende Zug an Server
                }
                catch (Exception e) { break; }
            }
            socket.close();
        } catch (IOException e) {
            System.err.println("Error: " + e.getMessage());
        }
    }

    // Diese Methode ermittelt den nächsten Zug des Bots. Sie wird von der run-Methode aufgerufen
    abstract protected char nextMove(View view) throws Exception;

    // Diese Klasse repräsentiert das Spielfeld
    public static class View {
        protected String data;
        protected int width;

        private void read(BufferedReader in) throws IOException {
            StringBuilder sb = new StringBuilder();
            data = in.readLine();
            if (data == null) {
                return;
            }
            sb.append(data);
            width = data.length();
            for (int i = 1; i < width; ++i) {
                sb.append(in.readLine());
            }
            data = sb.toString();
        }

        protected void print() {
            if (data == null || width < 1) {
                return;
            }
            for (int i = 0, len = data.length(); i < len; i += width) {
                System.out.println(data.substring(i, i + width));
            }
        }
    }
}