Today is April 1, 2012. Since the early morning, the whole city has been in a cheerful atmosphere. Every one in the city was playing a trick on each other delightfully, and so were Gary and Willy. It was a leisurely morning. Gary and Willy were chatting in their office, with a glass of wine. Hearing of 2012 is the end of the world, Gary, who wore a blue shirt with a red tie, said, "I'm worried now, did you see the news this morning? ". "No, what happened?" said Willy, the one who wore a yellow shirt with a blue tie. "There will be a huge rock hit the Earth today! The rock now is coming toward the Earth. It's not a joke. Today is the end of the world." said Gary. Out of expectation, it's true that there will be a rock hit the Earth, and it almost hit Gary and Willy. "Oh really? Your trick is completely surprised me! See, the rock outside looks like a real one!." said Willy.