Input (grade 13): The 1988 Summer Olympics, officially known as the Games of the XXIV Olympiad, were an all international multi-sport events celebrated from September 17 to October 2, 1988 in Seoul, South Korea.
Output (grade 12): The 1988 Summer Olympics, officially known as the Games of the XXIV Olympiad, were celebrated in Seoul, South Korea from September 17, through October 2.