public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.nextLine();
        String[] strArray = s.split("[ !,?._'@]");
         strArray = Arrays.stream(strArray)
                     .filter(str -> !str.isEmpty())
                     .toArray(String[]::new);
        System.out.println(strArray.length);
        Arrays.stream(strArray).forEach(e->System.out.println(e));
        scan.close();
    }