import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "       YES      leading spaces        are valid,    problemsetters are         evillllll";
		String[] splitString = s.replaceFirst("^\\W+", "").split("\\W+");
        System.out.println(splitString.length);
        for (String string : splitString) {
        	System.out.println(string);
        }
	}
}