public static void main(String[] args) { Scanner scan = new Scanner(System.in); String s = scan.nextLine(); // Write your code here.

    String ss = s.trim();

    String [] ourwords=ss.split("[  !,?._'@]+");

    int num=ourwords.length;
    if(ss.equals("")){
        num=0;
    }
    System.out.println(num);
    for (String word : ourwords){
        System.out.println(word);

    }