Input (grade 13): The Yucatán Peninsula, in southeastern Mexico, separates the Caribbean Sea from the Gulf of Mexico, with the northern coastline on the Yucatán Channel.
Output (grade 12): The peninsula is covers up the Mexican states of Yucatán, Campeche, and Quintana Roo; the northern part of Belize; and Guatemalas northern department of El Petén.