docs: public static void main(String[] args) throws IOException {
      System.err.println(new Americanize());
      System.err.println();
  
      if (args.length == 0) { // stdin -> stdout:
        BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
        String line;
        while((line = buf.readLine()) != null) {
          for(String w : line.split("\\s+")) {
            System.out.print(Americanize.americanize(w)+" ");
          }
          System.out.println();
        }
        buf.close();
      }
  
      for (String arg : args) {
        System.out.print(arg);
        System.out.print(" --> ");
        System.out.println(americanize(arg));
      }
    }