/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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
	{
		System.out.println("Test numbers test count gggg aaaaaa".replaceAll("\\b[a-zA-Z]{4}\\b", "SUPER"));
		System.out.println("Маша ела кашу".replaceAll("(?U)\\b\\p{L}{4}\\b", "SUPER")); 
	}
}