The French city of Douai, which has five letters, is located near the Belgian border. It is a commune in northern France, in the Nord department. The city is known for its Gothic-style churches and its large market square. The other French city near the Belgian border is Lille, which also has five letters. Lille is the capital of the Hauts-de-France region and is one of the most populous cities in France. It is known for its vibrant culture, its many museums, and its beautiful architecture.