Passage: Twelve extraterrestrial spacecraft hover over disparate locations around the Earth. A U.S. Army officer, Colonel G.T. Weber, recruits Banks and physicist Ian Donnelly to find out why the aliens have come. Weber takes them to an army encampment in Montana near one of the craft. On board, Banks and Donnelly make contact with two seven-limbed aliens, whom they call "heptapods"; Donnelly nicknames them Abbott and Costello. Banks and Donnelly begin researching their written language of complicated circular symbols. As Banks studies the language, she starts to have visions of a child who seems to be her daughter.

Question: What are the new names Donnelly gives to the aliens?
Abbott and Costello