import java.io.*; import java.util.*; public class JavaStringTokens { public static void main(String[] args) { Scanner scan = new Scanner(System.in); String s = scan.nextLine(); scan.close(); // Complete the code StringTokenizer st = new StringTokenizer(s, " !,?._'@"); System.out.println(st.countTokens()); while (st.hasMoreTokens()) { System.out.println(st.nextToken()); } } }