import java.util.*;
import java.util.regex.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		for (String text : Arrays.asList("0001113033AA55608981",
                                         "23456237472347823923",
                                         "00000000090000000000",
                                         "09008000800060050000",
                                         "AAAABBBBCCCCDDDDEEEE",
                                         "0000BBBBCCCCDDDDEEEE")) {
			System.out.println(text.replaceAll("(?<=[^0]\\w{3," + (text.length()-6) + "})\\w(?=\\w{4})", "*"));
        }
	}
}

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