import java.util.*; public class Solution { public static void main(String[] args) { Scanner scan = new Scanner(System.in); if(!scan.hasNext()) { System.out.print(0); scan.close(); return; } String sentence = scan.nextLine().trim(); scan.close(); String delimeters = "[ !,?._'@]+"; String[] tokens = sentence.split(delimeters); System.out.println(tokens.length); for (String token: tokens) { System.out.println(token); } } }