/* 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 str = "fffooooobbbbaarrr";
		for (int n = 0; n < 5; n++) {
			String repl = "";
			if (n > 0) {
				repl = str.replaceAll("((\\S)\\2{" + (n - 1) + "})\\2*", "$1");
			}
			System.out.println(repl);
		}
	}
}

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