/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.stream.Collectors;
 
/* 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[] wordsArray = {"aaaaa", "bbb", "aaaaa", "ccccccc", "bbb", "eeee"};
		Set<String> uniqueWords = new HashSet<>();
		uniqueWords.addAll(Arrays.asList(wordsArray));
		System.out.println(uniqueWords);
		System.out.println(uniqueWords.stream().filter(word -> word.length() > 4).collect(Collectors.toSet()));
	}
}

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