What brings together, two septuagenarians who have been setting cryptic puzzles for decades, a former Chief secretary of an Indian state, the man behind the popular Amul hoardings, two international scrabble champions, a Hula dancer from Hawaii who deftly handles the hardest clues, a banker from the Middle East who also holds a Guinness award.., this list can go on but let's cut to the chase! The answer is easy and begins with a C, or two depending on how you see it. In July 2014, a small…