/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        String tratar = "10\n"
                + "20 30\n"
                + "40 50 60\n"
                + "\n"
                + "70 80 90\n"
                + "\n"
                + "\n"
                + "100";
 
        String nova = tratar.replace(" ", "\n").replaceAll("\n+", "\n");
 
        System.out.println(nova);
	}
}

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