/* 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 task1 = "This this test is a test";
		String[] words = task1.split("\\s+");
		Map<String, Integer> wordsCount = Arrays.stream(words)
											.collect(Collectors.toMap(	a -> a,
																		a -> 1,
																		Integer::sum
																	)
													);
		String answer1 = Arrays.stream(words)
							.map(a -> wordsCount.get(a).equals(1)
										? a
										: "<strong>" + a + "</strong>")
							.collect(Collectors.joining(" "));
 
		System.out.println(answer1);
		// your code goes here
	}
}

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