"Cudillero's flag is rectangular, with 2: 3 proportions (width: length). Two transverse lines, from the lower corner of the flagpole to the upper half of the flag, and from the lower half of the flag to the upper corner of the wing, divide it into three parts. Blue that of the flagpole, white the central one and green that of the wing. It has the Cudillero shield in the center. Previously, the flag was completely white, with the shield in the center. The green color represents the rural area of ??the council, and the blue color, which illustrates the sea and its fishing customs."
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"Cudillero is a council, parish and locality of the autonomous community of the Principality of Asturias, in Spain. It limits to the west with Valdés, to the south with Salas and Pravia and to the east with Muros del Nalón and Pravia again
It has 4922 inhabitants and 9 parishes.