current community chat blog Programming Puzzles & Code Golf Programming Puzzles & Code Golf Meta Sign up or log in to customize your list. more stack exchange communities Stack Exchange sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Programming Puzzles & Code Golf beta Questions Tags Users Badges Unanswered Ask Question Take the 2-minute tour × Programming Puzzles & Code Golf Stack Exchange is a question and answer site for programming puzzle enthusiasts and code golfers. It's 100% free, no registration required. Onion Programming up vote 15 down vote favorite 1 Using only printable ASCII (hex codes 20 to 7E), write a sq...