Java Regex 2 - Duplicate Words

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    import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern;

    public class DuplicateWords {

    public static void main(String[] args) {
    
        String regex = "****\\b(\\w+)(\\s+\\1\\b)+****";
        Pattern p = Pattern.compile(regex,** Pattern.CASE_INSENSITIVE**);
    
        Scanner in = new Scanner(System.in);
        int numSentences = Integer.parseInt(in.nextLine());
    
        while (numSentences-- > 0) {
            String input = in.nextLine();
    
            Matcher m = p.matcher(input);
    
            // Check for subsequences of input that match the compiled pattern
            while (m.find()) {
                input = input.replaceAll**(m.group(0),m.group(1))**;
            }
    
            // Prints the modified sentence.
            System.out.println(input);
        }
    
        in.close();
    }
    

    }