import java.util.*;

public class Solution {

public static void main(String[] args) { Scanner scan = new Scanner(System.in); String str = scan.nextLine(); tokens(str); } public static void tokens(String s){ s = s.trim(); String[] words = s.split("\P{L}+");

if (s.length() == 0){
    System.out.println(0);
}
else{
    System.out.println(words.length);
}
for (String token:words){
    System.out.println(token);
}

} }