Input (grade 13): In addition to being Benin's largest city, it houses many of its government and diplomatic services; thus, it is Benin's de facto capital, even though the official capital is Porto-Novo.
Output (grade 8): Many of the government and diplomatic services of Benin are located in Cotonou. Because of this, the city is Benin's de facto capital, even though the official capital is Porto-Novo.