請問以下的文章中，總共出現幾個“e”？ The nation's top transportation official yesterday allayed disgruntled railway passengers, assuring that trains will be running overtime to meet heightened demand on an eastern line of the Taiwan Railway Administration (TRA) in advance of Chinese New Year. During the 30th-anniversary celebrations of the North-link line, Minister of Transportation and Communications (MOTC) Mao Chih-kuo said additional trains will be on call to ensure that all residents can make it home for the holidays amid difficulty in purchasing tickets on the eastern line that runs between Yilan and Hualien. Mao also took the opportunity to talk about the history and development of the North-link line as well as the island-wide railway network.