[shu-] Sherlock Holmes is in [1] front of the [-ai] high school where his wits has 衰 declined. He wears a 衣 dress and has a 丨 rod sticking out of his 口 mouth instead of the usual pipe. Some high school kids ask him some simple questions that he fails to answer. They say that he is the elementary one. His intelligence has indeed 衰 declined to that of an elementary school student. What is the source of this mysterious 衰 decline?