/* 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 in = "oogabooga";
		String val = "2";
		String result = in.replaceAll("(.{" + val + "})", "$0 ").trim();
		System.out.println(result);
 
		val = "4";
		result = in.replaceAll("(.{" + val + "})", "$0 ").trim();
		System.out.println(result);
	}
}

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