BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter(reader.readLine()));
            while (true) {
                String x = reader.readLine();
                writer.write(x + "\n");
                if (x.equals("exit")) {
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}