What determined the order of girls’ and boys’ names in the lists below?

　　以下名单是按怎样规则排列的？

　　Boys: Carl, Arthur, Rex, Ernest, Ralph

　　Girls: Jennifer, Ella, Lana, Nina, Nancy,

　　Answer:

　　In the list of boys’ names, the second letter of each name is the first letter of the next.

　　In the list of girls’ names, the second-to-last letter in each name is the last letter of the following name.