/* 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
	{
		// List<String> userNamesList = new ArrayList<String>();
		String userNames[] = {"hello", "world", "this", "is", "an", "hello","world", "copy list", "example"};
		List<String> userNamesList = Arrays.asList(userNames);
		//////////////////////////////////////////////
		//code to see
		Set set = new HashSet(userNamesList);
		List<String> list = new ArrayList(set);
		////////////////////////////////
 
 
		for (String temp : list){
        	System.out.println(temp);
        }
 
	}
}

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