In this Remove consecutive duplicate words, we would take
"alpha beta beta gamma gamma gamma delta alpha beta beta gamma gamma gamma delta"
as a input string, and output.
"alpha beta gamma delta alpha beta gamma delta"
One of the solution I saw was. very elegant but I still struggle with the regex

public class Kata {
    public static String removeConsecutiveDuplicates(String s){
           return s.replaceAll("(\b\S+)( \1\b)+", "$1");
    }
}

\b means the word boundary. \s+ means. one or more empty spaces.
( \1) means the first group ie (\b\S+)
. ( \1\b)+ means matching first group and a duplicate word, correct? I am sure what the empty space in ( \1\b)+ does actually.
I didn’t try anything.