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);
        }
	}
}

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