Original sentence: The land area of the Town of Cranberry Isles is composed of five islands: Great Cranberry Island (with the postal designation Cranberry Isles, zip 04625), Little Cranberry Island (with the postal designation Islesford, zip 04646,) Sutton Island, Bear Island, and Baker Island
Edited sentence: The land area of the Town of Cranberry Isles is composed of five islands: Great Cranberry Island (with the postal designation Cranberry Isles, zip 04625), Little Cranberry Island (with the postal designation Islesford, zip 04646), Sutton Island, Bear Island, and Baker Island