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