The coastline of Normandy was divided into seventeen sectors, with codenames using a spelling alphabet—from Able, west of Omaha, to Roger on the east flank of Sword. Utah was originally designated "Yoke" and Omaha was "X-ray", from the phonetic alphabet. The two names were changed on 3 March 1944. "Omaha" and "Utah" were probably suggested by Bradley. Eight further sectors were added when the invasion was extended to include Utah. Sectors were further subdivided into beaches identified by the colors Green, Red, and White.